Find the missing number?

Answer: Option B

Logic:
Divide each circle in two equal circle vertically. Now,
Sum of the left hand element in first circle = Top left hand element in middle circle.
3 +2 + 8 = 13
Sum of the right hand element in first circle = bottom left hand element in middle circle.
6 + 9 + 1 = 16
Sum of the left hand element in Third circle = Top right hand element in middle circle.
4 + 5 + 2 = x
x = 11.
Missing element = 11.