Pointing towards a photograph Mr. Ajit said, “She is my father's wife's son's only sister.” What is the relation of the person in the photograph with Mr. Ajit?

Correct — D, Sister. Take the chain one possessive at a time, left to right. Mr. Ajit's father's wife is his own mother. That mother's son is Ajit himself. And the only sister of that son is the mother's daughter — Ajit's sister. The stem's word "She" confirms the person is female, and the answer is (d). The chain is robust even if you read "my father's wife's son" as one of Ajit's brothers rather than Ajit: the brother's only sister is still the same girl, the one daughter of Ajit's parents.

• (a)Daughter — A daughter would mean the chain steps down a generation from Ajit. It never does — the last link is "son's only sister", which moves sideways within the same set of siblings.
• (b)Mother's sister — Ajit's mother's sister is his maternal aunt, one generation above him. To reach her the statement would have to read "my father's wife's sister", stopping a link early.
• (c)Cousin — A cousin is the child of a parent's brother or sister. The chain here stays inside Ajit's own parents' family and never passes through an uncle or an aunt.

A blood-relation chain is resolved from the speaker outwards, replacing each possessive with a plain relationship word before touching the next one. "My father's wife" collapses to "my mother", "my mother's son" collapses to "myself or my brother", and the final link then attaches to that person. The trick lies entirely in the bookkeeping; there is no ambiguity in the wording once the substitutions are written down.

Two devices make this harder than it looks. First, the long possessive string tempts you to jump to the last two words and answer "sister of a son", which is where the option "Cousin" catches people. Second, the middle of the chain is genuinely double-valued — the mother's son could be Ajit or a brother of his — and candidates freeze there. The word "only" defuses it: whichever son you pick, his one sister is the one daughter of the same parents, so the answer does not change. Write the chain as a two-row family sketch and the item takes fifteen seconds.

• Resolve a relation chain left to right, replacing each link with a single relationship word before moving on.
• "Father's wife" means mother unless the paper explicitly says step-mother.
• "Mother's son" means the speaker himself or a brother of his; the word "only" in the next link makes the two readings coincide.
• The pronoun in the stem — "She" — fixes the gender of the person in the photograph and rules out every male relation.
• No link in this chain changes generation, so the answer has to lie at Ajit's own level.

• Stopping at "son" and answering brother.
• Reading "father's wife" as step-mother and inventing a half-sibling.
• Ignoring the pronoun "She" and picking a male relation.

Asked as a single-sentence pointing-at-a-photograph chain, testing whether you can substitute one link at a time instead of guessing from the last two words.

• practice — not a real PYQ

  Pointing to a man, Reena said, "He is the only son of my mother's mother." How is the man related to Reena?

  • (a)Father
  • (b)Maternal uncle
  • (c)Brother
  • (d)Cousin

  Answer(b) Maternal uncle — mother's mother is Reena's grandmother, and that grandmother's son is Reena's mother's brother.

• practice — not a real PYQ

  Introducing a woman, Karan said, "She is the daughter of my grandfather's only child." How is the woman related to Karan?

  • (a)Aunt
  • (b)Niece
  • (c)Sister
  • (d)Daughter

  Answer(c) Sister — the grandfather's only child must be Karan's own parent, so that parent's daughter is Karan's sister.