Correct Answer: Voltmeter : Voltage

Solution : Given:
Thermometer : Temperature (This depicts the relation between the instrument and the purpose for which it is used – A thermometer is an instrument that measures temperature.)

Let's check the options –
First option: Taseometer : Acceleration→Taseometer is an instrument that measures strains.
Second option: Micrometer : Speed→Micrometers are used to measure the dimensions of objects.
Third option: Voltmeter : Voltage→Voltmeter is an instrument that measures voltages.
Fourth option: Galvanometer : Sound→A galvanometer is an instrument used for measuring electrical current.

So, only the third option follows the same pattern as followed by the given pair of words. Hence, the third option is correct.