Hard
Which relative of yours will your father's sister's son call his maternal grandfather?
Explanation
Explanation
Your father's sister's son is your cousin. His mother is your father's sister (your aunt). His 'maternal grandfather' is his mother's father — that is, your aunt's father, who is the same person as your father's father, i.e. your Paternal Grandfather. So the answer is Paternal grandfather, option (4).
PRO TIP
Re-check your working by substituting the answer back into the original question.