Select the option in which pair of words are related in the same way as are the pair of words of following set. Ammeter  :  Current  : :  ?

Taseometer : Humidity Orography : Plants Anemometer : Wind Hygrometer : Strain

Anemometer : Wind

Ammeter is instrument for measurement of Current. Similarly, Anemometer is used for measurement of velocity of Wind. So correct answer is (3).