Q: If A + B means A is the son of B ; A - B means A is the husband of B ; A x B means A is the sister of B, then which of the following shows the relation Q is the maternal uncle of P ?

• 1
  P + B - R x Q
• 2
  P - B + R x Q
• 3
  P + B x R -Q
• 4
  P x B - R + Q
• 5
  None of these