What is the average of a, b, c and d ?
I. a, b, c and d are primes.
II. a, b, c and d lie in {10, 11, 12, ......., 20}

A

If the statement I alone is sufficient to answer the question

B

If the statement II alone is sufficient to answer the question

C

If both the statements I and II are sufficient to answer the question but neither statement alone is sufficient.

D

If both the statements I and II together are not sufficient to answer the question and additional data is required.