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Question

# How many sons does D have ?Statements:1. A's father has three children.2. B is A's brother and son of D.

A
I alone is sufficient while II alone is not sufficient
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B
II alone is sufficient while I alone is not sufficient
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C
Either I or II is sufficient
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D
Neither I nor II is sufficient
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E
Both I and II are sufficient
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Solution

## The correct option is B Neither I nor II is sufficientFrom both I and II together, we can conclude that A and B are the children of D, but the sex of A and the third child of D is not known. So, both I and II together are also not sufficient to answer the question.

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