A's father's wife's only daughter is B. How is A related to B?

Question

A's father's wife's only daughter is B. How is A related to B?

1. A. Nephew
2. B. Cousin
3. C. Sibling (Correct answer)
4. D. Uncle

Correct Answer

Option C — Sibling

Detailed Solution & Explanation

The correct answer is Sibling.

Key Points

• Unpack the phrase from the inside out:
  • "A's father's wife" is A's mother.
  • Her "only daughter" is B.
• So A and B share the same mother, making them siblings.
• The answer is given as *sibling* rather than *brother* or *sister* because A's gender is never stated — only B is identified as the daughter.

Additional Information

• Note the internal logic: since B is the mother's only daughter, A cannot be a second daughter, so A must be male in practice — yet the option set uses the gender-neutral term, which remains correct either way.
• Cousin would require the relative to come through an uncle or aunt, and nothing in the chain introduces one.
• Indirect phrasings such as *father's wife*, *mother's husband* and *sister's father* are simply longer names for immediate relatives; converting them at once keeps the chain short.

प्रश्न (हिन्दी में)

A के पिता की पत्नी की एकमात्र पुत्री B है। A का B से क्या संबंध है?

1. A. भतीजा
2. B. चचेरा
3. C. भाई-बहन
4. D. चाचा