Select the option that is related to the third word in the same way as the second word is related to the first word: Sextant : Angle : : Bolometer : ?

Radiant Energy Radiation of charged particle Resistance of wire Vibration of any wire

Radiant Energy

Sextant is an instrument to measure angle between two object, whereas Bolometer measures Radiant Energy from any object or thing. So correct answer is (A).