Statement: All brick are stones. Some stones are rocks. All rocks are mountains.

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Question
Statement:
All brick are stones. Some stones are rocks. All rocks are mountains.
Conclusions:
I. Some mountains are stones.
II. Some mountains are bricks.
III. Some stones are bricks.
Options
A. Only I follow
B. Only III follow
C. Only I and III follow
D. All follow

Correct Answer

Only I and III follow

Explanation

Some stones are rocks + All rocks are mountains = I + A = I = Some stones are mountains ? conversion ? Some mountains are stones (I). Hence II follows. All brick are stones + Some stones are mountains = A + I = No conclusion Hence II does not follow. All brick are stones (A) ? conversion ? Some stone are bricks(I). Hence III follows.

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Discussion

Statement:
All brick are stones. Some stones are rocks. All rocks are mountains.
Conclusions:
I. Some mountains are stones.
II. Some mountains are bricks.
III. Some stones are bricks.

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Discussion

Statement: All brick are stones. Some stones are rocks. All rocks are mountains. Conclusions: I. Some mountains are stones. II. Some mountains are bricks. III. Some stones are bricks.

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More in Verbal Reasoning:

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Programming

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Statement:
All brick are stones. Some stones are rocks. All rocks are mountains.
Conclusions:
I. Some mountains are stones.
II. Some mountains are bricks.
III. Some stones are bricks.