Direction: In each of th following questions, certain pairs of words are given, out of which the words in all pairs except one, bear a certain common relationship. Choose the odd pair.
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N/A
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- Ammeter : Current
- Hygrometer : Pressure
- Odometer : Speed
- Seismograph : Eartquakes
Correct Option: B
In all pairs except (b), first is the name of instrument which is used to measure the second.