Question

1 point
Q3. What is not necessary among
following ?
O
A) Thermometer should be washed before
and after use,
O
B) Don't hold the thermometer by the bulb
while reading it
O
C) Read the thermometer keeping the level
of mercury along the line of sight
OD) All are necessary​

Answer 1

Answer:

D) All are necessary

So hope this answer helps you