P is the son of Q. Q and R are siblings. S is R's mother. How is S related to P?
- A. Mother
- B. Grandfather
- C. Aunt
- D. Grandmother ✓
Correct answer
D. Grandmother
Explanation
S is R's mother and, since Q and R are siblings, S is also Q's mother. As Q is P's father, S is P's grandmother.