P + Q means 'P is father of Q'

P - Q means 'P is mother of Q'

P × Q means 'P is daughter of Q'

P ÷ Q means 'P is son of Q'

Based on the above information, find out which of the given statements can be the reason/s behind the assertion made below if it is given that 'A ÷ B – C × D'

Assertion: A is brother of E?

Reason A: D + E

Reason B: E - C

Correct option is B

Thus, correct option is (b).