In each of the following, a question is followed by thre statements marked I, II and III. Decide which of the statements are sufficient to answer the question. Choose your answer from the given alternative.
How many sons does X have ?
I. Q and U are brothers of T.
II. R is sister of P and U.
III. R and T are daughters of X.

I and II only

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I, II and III together

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II and III together

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I, II and III together are not sufficient

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Solution

The correct option is B I, II and III together are not sufficient
Statement I, we get no information about X or his sons.
Statement II, we get no information about X or his sons or other relation that could inform about X and his sons.
Statement III cannot tell us about the number of sons of X.
so none of them are suffiicient.
option D

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