Find the missing number?

A. 4

B. 17

C. 13

D. 9

Answer: Option A

Solution(By Examveda Team)

In each row of the diagram, the sum of the left and right hand digits, minus the central digit is always 8.

11 + 5 - 8 = 8
12 + 10 - 14 = 8
7 + x - 3 = 8
x = 4.
Missing Element = 4.