mental ability

‘A + B’ means ‘A is the son of B’, ‘A – B’ means ‘A is the wife of B’. ‘A × B’ means ‘A is the brother of B’, ‘A ÷
B’ means ‘A is the mother of B’, ‘A = B’ means ‘A is the sister of B’. Which of the following represents P is
the maternal – uncle of Q ?
(A) R × P ÷ Q (B) P × R ÷ Q (C) P + R ÷ Q (D) P + R × Q