Direction : In each of the following questions, select the related…

Concept: In a "select the related pair" analogy question, the first pair fixes a specific RELATIONSHIP between its two terms. The correct option is the ONLY one whose two terms carry that exact same relationship — not just any loosely-associated pair of words.

Application: In Automobile : Petrol, the relationship is "needs this substance as fuel/input in order to operate or function." An automobile cannot run without consuming petrol. To complete the analogy, look for the option pair where the first term likewise needs the second term as its essential input to function.

Cross-check against each pair:

• Fire : Fuel — fire is not a distinct entity that draws in fuel from outside to power itself; fire IS the visible process of fuel burning, so without fuel there simply is no fire, whereas an automobile without petrol still exists as an automobile, merely non-functional. This existential difference means this pair does not carry the same "exists independently but needs input to function" relationship as the given pair.

• Plane : Propeller — a propeller is a structural part of a plane, not a substance the plane consumes to run, so this is a "has-a-part" relationship, not "needs-as-fuel-to-function."

• Diesel : Gas — both terms are themselves fuels/substances; neither consumes the other, so no needs-to-function relationship exists between them.

• Man : Food — a human being needs food as the essential input to live and function, exactly mirroring how an automobile needs petrol to run.

Result: Only Man : Food carries the identical "needs this as essential input to function" relationship as Automobile : Petrol.