Which of the following pairs will replace the question marks?
Soldier : Regiment :: ? : ?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Sailor : Crew
A regiment is a body of soldiers serving together, so the pair links a person with the group of such persons he belongs to. A crew is the group of sailors who work a ship.
Why the other options are incorrect
Option (1) Wheels : Bearings — Incorrect. Bearings are small parts fitted in a wheel so that it turns smoothly, not a group of wheels.
Option (3) Book : Printer — Incorrect. A printer is the one who prints a book, not a group of books.
Option (4) Nitrogen : Gas — Incorrect. Nitrogen is one kind of gas; "gas" is a type of substance, not a group of nitrogen members working together.