Among the following what should not be done while or before using a clinical thermometer?

(B) If we wash thermometer with hot water , mercury will expand due to heat given by hot water and will rise to a higher temperature. If the water is very hot , it may result in the damage of thermometer .Hence it must not be done .

(C) It must be handled with care as being made of glass and mercury inside it is poisonous .

(D) If we hold the bulb by our hand , thermometer will take heat from hand and will show a wrong reading hence we should not hold it by bulb