Find the missing number?

Answer: Option A

Calculating the sum of the 3 numbers in each row, from top to bottom, the rows follow the sequence of 11, 13, 15 etc. i.e.

3 + 5 + 3 = 11
2 + 4 + 7 = 13
8 + 4 + 3 = 15
6 + 2 + 9 = 17
So,
2 + 11 + x = 19
x = 6.
Missing Element = 6.