In a coded relation, if P - Q means P is the mother of Q, P + Q means P is the father of Q, and P ÷ Q means P is the sister of Q, what is the relationship of R if P - R + Q?
Answer: A. R is the daughter of Q
P - R means P is the mother of R, and P + Q means P is the father of Q, so R is the daughter of Q.