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  • Question
  • Statements: All trees are flowers. No flower is fruit. All branches are fruits.

    Conclusions:

    1. Some branches are trees.
    2. No fruit is tree.
    3. No tree is branch.


  • Options
  • A. None follows
  • B. Only either I or III follows
  • C. Only II follows
  • D. Only either I or III, and II follow
  • E. None of these

  • Correct Answer
  • None of these 

    Explanation
    All trees are flowers. No flower is fruit.

    Since both the premises are universal and one premise is negative, the conclusion must be universal negative (E-type) and should not contain the middle term. So, it follows that 'No tree is fruit'. II is the converse of this conclusion and so it follows.

    All branches are fruits. No flower is fruit.

    Since both the premises are universal and one premise is negative, the conclusion must be universal negative (E-type) and should not contain the middle term. So, it follows that 'No branch is flower'.

    All trees are flowers. No branch is tree.

    As discussed above, it follows that 'No tree is branch'. So, III follows.

    Hence, both II and III follow.


    Logical Deduction problems


    Search Results


    • 1. Statements: All snakes are trees. Some trees are roads. All roads are mountains.

      Conclusions:

      1. Some mountains are snakes.
      2. Some roads are snakes.
      3. Some mountains are trees.


    • Options
    • A. Only I follows
    • B. Only II follows
    • C. Only III follows
    • D. Both I and II follow
    • E. None follows
    • Discuss
    • 2. Statements: All tigers are jungles. No jungle is bird. Some birds are rains.

      Conclusions:

      1. No rain is jungle.
      2. Some rains are jungles.
      3. No bird is tiger.


    • Options
    • A. Only I and II follow
    • B. Only III follows
    • C. Only either I or II, and III follow
    • D. All follow
    • E. None of these
    • Discuss
    • 3. Statements: Some rats are cats. Some cats are dogs. No dog is cow.

      Conclusions:

      1. No cow is cat.
      2. No dog is rat.
      3. Some cats are rats.


    • Options
    • A. None follows
    • B. Only I and II follow
    • C. Only II and III follow
    • D. Only III follows
    • E. All I, II and III follow
    • Discuss
    • 4. Statements: All flowers are toys. Some toys are trees. Some angels are trees.

      Conclusions:

      1. Some angels are toys.
      2. Some trees are flowers.
      3. Some flowers are angels.


    • Options
    • A. None follows
    • B. Only I follows
    • C. Only II follows
    • D. Only III follows
    • E. Only I and III follow
    • Discuss
    • 5. Statements: All tigers are lions. No cow is lion. Some camels are cows.

      Conclusions:

      1. Some lions are camels.
      2. No camel- is tiger.
      3. Some tigers are cows.


    • Options
    • A. None follows
    • B. Only I follows
    • C. Only II follows
    • D. Only III follows
    • E. Either I or II follows
    • Discuss
    • 6. Statements: Some uniforms are covers. All covers are papers. All papers are bags.

      Conclusions:

      1. All covers are bags.
      2. Some bags are covers, papers and uniforms.
      3. Some uniforms are not papers.


    • Options
    • A. Only I follows
    • B. Only I and II follow
    • C. Only III follows
    • D. All I, II and III follow
    • E. None of these
    • Discuss
    • 7. Statements: No rabbit is lion. Some horses are lions. All rabbits are tables.

      Conclusions:

      1. Some tables are lions.
      2. Some horses are rabbits.
      3. No lion is table.


    • Options
    • A. None follows
    • B. Only either I or III follows
    • C. Only II and III follow
    • D. Only III follows
    • E. None of these
    • Discuss
    • 8. Statements: All benches are desks. Some desks are roads. All roads are pillars.

      Conclusions:

      1. Some pillars are benches.
      2. Some pillars are desks.
      3. Some roads are benches.
      4. No pillar is bench.


    • Options
    • A. None follows
    • B. Only either I or IV, and III follow
    • C. Only either I or IV follows
    • D. Only either I or IV, and II follow
    • E. All follow
    • Discuss
    • 9. Statements: Some dogs are rats. All rats are trees. Some trees are not dogs.

      Conclusions:

      1. Some trees are dogs.
      2. All dogs are trees.
      3. All rats are dogs.
      4. No tree is dog.


    • Options
    • A. None follows
    • B. Only I follows
    • C. Only I and II follow
    • D. Only II and III follow
    • E. All follow
    • Discuss
    • 10. Statements: Some bricks are trees. All trees are pens. All pens are boats.

      Conclusions:

      1. Some boats are bricks.
      2. Some pens are bricks.
      3. Some trees are bricks.
      4. Some bricks are boats.


    • Options
    • A. Only I and II follow
    • B. Only III and IV follow
    • C. None follows
    • D. All follow
    • E. None of these
    • Discuss


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