How many sons does D have ? (I) A's father has three children. (II) B is A's brother and son of D.




Here we have two statements numbered I and II given below. You have to decide whether the data provided in the statements are sufficient to answer the question. Read both the statements.

  1. If the data in statement I alone are sufficient to answer the question, while the data in statement II alone are not sufficient to answer the question
  2. If the data in statement II alone are sufficient to answer the question, while the data in statement I alone are not sufficient to answer the question
  3. If the data either in statement I alone or in statement II alone are sufficient to answer the question
  4. If the data given in both statements I and II together are not sufficient to answer the question
  5. If the data in both statements I and II together are necessary to answer the question.


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

A. I alone is sufficient while II alone is not sufficient

B. II alone is sufficient while I alone is not sufficient

C. Either I or II is sufficient

D. Neither I nor II is sufficient

E. Both I and II are sufficient

Answer : D. Neither I nor II is sufficient


Explanation:


    From 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 the statements together are also not sufficient to answer the question.


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