Angle : Radian : :

Concept: A verbal analogy pairs two words sharing a specific logical relationship. One common pattern is Quantity : Unit — the first word names a measurable quantity, and the second names the standard unit in which that quantity is conventionally expressed.

Application: In “Angle : Radian”, Angle is the quantity and Radian is its unit of measurement, fixing the required relationship as Quantity : Unit. Applying the same relationship to the options, Area is the quantity and Hectares is the unit in which area is measured, so “Area : Hectares” reproduces the exact Quantity : Unit pattern.

Contrast:

• “Cattle : Herd” pairs a set of individual members with the collective noun for that group — a Member : Collective-noun relation, not Quantity : Unit.

• “Odometer : Speed” pairs an instrument with a quantity, but an odometer measures distance travelled, not speed, so even the Instrument : Quantity relation is mismatched here.

• “Dearth : Scarcity” pairs two words with nearly the same meaning — a Synonym relation, not Quantity : Unit.

None of the three alternatives carries a Quantity : Unit relationship, so “Area : Hectares” is the only pair that matches the given analogy.