Find the missing character?

A. 20

B. 21

C. 22

D. 23

Answer: Option D

Solution(By Examveda Team)

Column One:
(10 +12+4+10) /2 = 18

Column Two:
(11 +12 +5+20) /2 = 20

Column Three:
(15 +8 +10 +13) /2 = X(Let)
X = 23.