The correct option is C Both A and B
The instrument which is used to
measure the temperature is known as thermometer. Thermometers are of two types:
- Clinical thermometer and laboratory thermometer. Clinical thermometer is used
for measuring the temperature of body and laboratory thermometer is used for
measuring the temperature of atmosphere. They have different markings, but they
work in same way. In the thermometer,
glass tube is filled with mercury. Mercury is used to measure temperature
because it changes from a solid to liquid very easily.