When the circumference and area of a circle are numerically equal, then the diameter is numerically equal to
Options
A) area	B) circumference	C) 4	D) 2 π	E) none of these

Rationale: according to question , circumference of circle = area of circle or π d = π ( d ⁄ 2 ) 2 [ where d = diameter ] ∴ d = 4 answer c
Answer: C