What is the area of a circle with centre 0 ?
I. The diameter of the circle is 4.
II. The circumference of the circle is `4 pi`.

Options

A. If statement (I) alone is sufficient to answer the question.
B. If statement (II) alone is sufficient to answer the question.
C. If either (I) or (II) alone is sufficient to answer the question.
D. If both statements (I) and (II) taken together are sufficient to answer the question.

Answer

C

Explanation

In this question, statement I is sufficient to answer. We can determine the radius of the circle i.e. 2. Statement II is also sufficient
Circumference `= 2 pi r rArr 4 pi = 2 pi r rArr r=2`.
Thus, each statement alone is sufficient to answer the questions.
Therefore, the correct answer choice is (c).