4. When a body, floating in a liquid, is given a small angular displacement, it starts oscillating about a point known as
A. centre of buoyancy
B. centre of pressure
C. metacentre
D. centre of gravity
4. When a body, floating in a liquid, is given a small angular displacement, it starts oscillating about a point known as
A. centre of buoyancy
B. centre of pressure
C. metacentre
D. centre of gravity