Q:

If A @ B means ‘A is the mother of B’, A # B means ‘A is the brother of B’, A * B means ‘A is the sister of B’, A % B means ‘A is the father of B’, then which of the following indicates the relationship R is the grandmother of Q?

• 1
  R @ P * S % Q
• 2
  R * Q $ S # P
• 3
  P @ R % S * Q
• 4
  P $ R @ S * Q