Is ABCD a cyclic quadrilateral ?
I. The lengths of the diagonals are given.
II. A circle with mid point of a diagonal as centre passes through the vertices.

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.