In a coded relation, if P × Q means P is the mother of Q, P + Q means P is the daughter of Q, and P - Q means P is the son of Q, what is the relationship of R to S if R × S and S - R are true?

B. R IS S'S MOTHER

In a class of students, there are four students: Alex, Brian, Charlie, and Diana. Each student has a different favorite subject: Math, Science, History, and Art. Alex does not like Math or Science. Brian's favorite is not History. Charlie likes Science. What subject does Diana like?

D. ART

If 'APPLE' is coded as 1613125, what is the code for 'LEMON'?

B. 12141315

In a family, M is the father of N and O. P is the mother of N and O. Q is the sister of N. If O is a musician, what is Q's relationship to O?

A. SISTER

If 'BIRD' is coded as '7890' and 'DOVE' is coded as '1234', what is the code for 'RIDE'?

A. 7890