In this question, a question is followed by two statements numbered (I) and (II). You have to decide whether the data provided in the statements are sufficient to answer the question. Read both the statements and decide the appropriate answer.

Q. Five children were administered psychological tests to know their intellectual levels. Which child is the most intelligent?

(I) The child A is less intelligent than the child B. The child C is less intelligent than the child D..

(II) The child B is less intelligent than the child C and child A is more intelligent than the child E.

A < B and C < D

But no link between groups (A, B) and (C, D), and no information about E.

Thus, statement I alone is not sufficient.

B < C and A > E

Still, no full ranking among all five children.
Thus, statement II alone is also not sufficient.

From I and II:

A < B

C < D

B < C

A > E

Putting them together:

A < B < C

C < D

A > E

Thus, the complete chain is:

E < A < B < C < D

So, D is the most intelligent.

Thus, correct option is (a).