Geometry, Mensuration, Trigonometry, Coordinate Geometry

Directions for questions 121 to 127: Each question is followed by two statements, I and II.

Mark
(a) if the question can be answered by one of the statements alone and not by the other.
(b) if the question can be answered by using either statement alone.
(c) if the question can be answered by using both the statements together, but cannot be answered by using either statement alone.
(d) if the question cannot be answered even by using both statements together.

A square is inscribed in a circle. What is the difference between the area of the circle and that of the square?
I. The diameter of the circle is 25 √2 cm.
II. The side of the square is 25 cm.