If the volume and surface area of a sphere are numerically the same, then its radius is :

A. 1 unit

B. 2 units

C. 3 units

D. 4 units

Answer: Option C

Solution(By Examveda Team)

$$\eqalign{ & \frac{4}{3}\pi {r^3} = 4\pi {r^2} \cr & \Rightarrow r = 3 \text{ units} \cr} $$