Find the missing number?

A. 1

B. 8

C. 3

D. 6

Answer: Option D

Solution(By Examveda Team)

Logic:
Central Element = (Sum of other 4 element)/4

Thus,
(x + 21 + 16 + 5)/4 = 12
x = 48 - 42
x = 6.
Missing element = 6.