Correct Answer - Option 3 : Barometer
The logic follows here is:
Scale is an instrument used to measure the length.
Barometer is an instrument used to measure pressure.
Hence, the correct answer is "Barometer".
The pascal (Pa) is the SI unit of pressure and stress in the metre-kilogram-second system (the International System of Units [SI].
||It measures altitudes and is used in aircraft.
||It measures heat radiation.
||It measures sound underwater.
||It measures humidity in the air.
||It determines the purity of milk.
||It measures a very high temperature.
||It measures the viscosity of liquids.