If “A+B’ stands for ‘A is the father of B’. ‘A-B’ stands for ‘A is the wife of B’ and ‘$$A \div B$$’ stands for ‘A is the sister of B’ then ‘$$P+Q \div R$$’ means

A

P may be father of R

B

R is sister of P

C

R may be father of P

D

P is sister of R