Question

Is D brother of J ?
Statement I. J is the sister of M and K.
Statement II. K is the brother of D.

• A. If the data in statement I alone are sufficient to answer the question,while the data in statement II alone not sufficient to answer the question;
• B. If the data in statement II alone are sufficient to answer the question,while the data in statement I all are not sufficient to answer the question;
• C. If the data either in statement I alone or in statement II alone are sufficient to answer the question;
• D. If the data even in both statements I and II together are not sufficient to answer the question;
• E. If the data in both statements I and II together are necessary to answer the question.

Answer 1

The correct option is D If the data even in both statements I and II together are not sufficient to answer the question;

From statement I:

J$\to$ sister of M and K. Here, it is clear that J is girl but it is not clear that M and K are girl or boy.

From statement II:

K$\to$ D. Here, it is clear that K is boy but not cleared that D is boy or girl.

Combining both statements ,D will be either brother or sister of J.

Therefore, Both statements together are not sufficient to answer the question.

Hence, D is the correct option.