A) Thermometer is read by holding its bulb.
B) A few sharp jerks are given to clinical thermometer before using it.
C) The black fabric tent is preferred during winter.
D) Shopkeepers selling ice blocks usually cover them with jute sacks.
Correct Answer: A
Solution :
If we hold a thermometer by its bulb, the mercury in the bulb will expand due to out body temperature.
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