EduGoog
Choose or find odd pair of words

(Ammeter : Current) , (Hygrometer : Pressure) , (Odometer : Speed) , (Seismograph : Earthquakes)

Option:
A. Ammeter : Current
B. Hygrometer : Pressure
C. Odometer : Speed
D. Seismograph : Earthquakes
Answer: B . Hygrometer : Pressure

Justification:

In all the pairs, first is an instrument to measure the second.

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