Subject :NSO Class : Class 7
Which of the following statements is/are
correct?
I. Thermometer is read by holding its bulb.
II. A few sharp jerks are given to clinical thermometer before using it.
III. Black fabric is preferred during winter.
IV. Shopkeepers selling ice blocks usually cover them with jute sacks.
AI only
BII and III only
CIII and IV only
DII, III and IV only