In the following question, select the related word pair from the given alternatives :
Ammeter : Current : : ? : ?

Options

A. (a) Scale : Speed
B. (b) Setsmograph : Density
C. (c) Barometer : Mass
D. (d) Anemometer: Wind

Answer

D

Explanation

The first is used to measure the second. Ammeter is an instrument to measure the strength of an electric current . Similarly , Anemometer is an instrument to measure the velocity and direction of wind.