R is P's father's nephew. S is P's cousin but not the brother of R. How is S related to R? A. Father B. Sister C. Mother D. Aunt

R is the son of P's father's brother or sister, i.e. R is P's cousin. S is also P's cousin but is not R's brother. Among the options, the relation that fits is that S is R's sister (a female cousin in the same family).