Pointing to a women Raj says: She is the grandfather of only son. Who is she?

Correct answer

Mother

Explanation

Explanation The woman is Raj's mother The grandfather's only son is the woman's father. The woman's father's only son would be her brother or possibly herself if she is also the son in question, but the riddle states that the only son is also Raj's son in this riddle. The woman's father is the grandfather's only son. The woman's father's son is the woman's brother, and she is the sister of the woman.