Find the missing number?

A. 16

B. 19

C. 18

D. 21

Answer: Option A

Solution(By Examveda Team)

Left to Right, numbers increase by 3, then 2, then 1 after this it will start repeating the pattern.
5 + 3 = 8.
8 +2 = 10.
10 + 1 = 11.
Now, pattern will repeat.
11 + 3 = 14.
14 + 2 = 16.
So, Missing number = 16.