Consider the following statements.
1. SI unit of atmospheric pressure is Nm^-2 or pascal and CGS unit is dyne/cm².
2. The barometer is a device by which the atmospheric pressure is measured.
3. The standard atmospheric pressure is the pressure required of 76 cm of Hg column or 760 mm of Hg column, which is equivalent to 1 atm.
Which of the statements given above is/are correct?

Density of water is

A. maximum at 0°C

B. minimum at 0°C

C. maximum at 4°C

D. minimum at -4°C

The body is called perfectly plastic body

A. if the body completely gain its original shape after removal of deforming force

B. if the body remains in deformed shape even after removal of the deforming force

C. if weight of the body is equal to force of buoyancy

D. None of the above

Pressure is a scalar quantity because

A. it is the ratio of force to area and both force and area are vectors

B. it is the ratio of magnitude of force to area

C. it is the ratio of component of force (normal to area) to area

D. None of the above

Why do water droplets always take a round shape when dropped onto plane surfaces?

A. Due to gravity

B. Due to atmospheric pressure

C. Due to the presence of Eddy current in the air

D. Due to exertion of surface tension by the molecules