This is a question from https://international-iq-test.com/
Here is my attempt at a solution, though it's too convoluted so it's probably wrong:
Answer is E. The left side and right side combine together to make the middle. Odd numbers + Odd numbers add together. Even numbers + Even numbers add together. Other combinations subtract. Using these rules: 1st row -> 2 clubs - 1 club = 1 club; 2 spades - 1 spades = 1 spade. 2nd row -> 1 club + 1 club = 2 clubs. 2 spades - 1 spade = 1 spade. 3rd row -> 2 clubs - 1 club = 1 club; 2 spades + 0 spades = 2 spades.