Q:

If A × B means that A is the father of B, A + B means that A is the mother of B, A ÷ B means that A is the brother of B then which of the following expression shows that Q is the son of P?

• 1
  Q + P × R
• 2
  P + Q × R
• 3
  R × Q + P
• 4
  P + Q ÷ R