Consider the following statements.
1. The SI unit of young's modulus of elasticity is N/M².
2. The reciprocal of the bulk modulus of the material of the body is called the compressibility of that material.
3. Compressibility of gases is very small.
Which of the statements given above 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