P is the aunt of Q. Q is the grandchild of R. How is R related to P?
Correct: D
If P is Q's aunt, P is the sister of Q's parent. R is Q's grandparent, making R either the parent of P or the parent of Q's parent. Since R is Q's grandparent and P is Q's aunt, R must be P's parent. Thus, R is P's father or mother.