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Statements: Some hills are rivers. Some rivers are deserts. All deserts are roads. Conclusions: Some roads are rivers. Some roads are hills. Some deserts are hills.

None follows
Only I follows
Only I and II follow
Only II and III follow
All follow

Correct Answer: Only I follows

Explanation:

Some hills are rivers. Some rivers are deserts.

Since both the premises are particular, no definite conclusion follows.

Some rivers are deserts. All deserts are roads.

Since one premise is particular, the conclusion must be particular and shouldn't contain the middle term. So, it follows that 'Some rivers are roads'. I is the converse of this conclusion and so it holds.

Some hills are rivers. Some rivers are roads.

Again, since both the premises are particular, no definite conclusion follows.

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