The point, through which the whole weight of the body acts, irrespective of its position, is known as:

Center of Gravity.

However, In a uniform gravity field , both center of gravity and center of mass will be same. 

B

All objects behave as though their mass (the stuff they're made from) is concentrated at a point called their center of gravity

(as long as you are on earth)

Centre of Gravity = the point where all the weight seems to be concentrated.

Centre of Mass = the point where all the mass seems to be concentrated.

Where the weight of an object is usually taken to be the force on the object due to the gravity . Also we know that the mass of any body is constant and the weight is variable according to  gravity (the weight is not the same for the same mass if it in the earth and if it in the moon or the space).

So the answer is B

Option-B centre of gravity is correct

B: centerpoint of gravity on wich you can balance everything if you have the strenght for it.

Based on Physics laws. The correct answer is definitely choice (D) Center of Mass, which represents the center of any mass particles and objects, and includes humans.

B

Its Option B, C.O.G.

It looks like center of gravity refers to center of mass ... therefore B and D would be correct

By selecting the center of gravity as the reference point for a rigid body, the gravity forces will not cause the body to rotate, which means weight of the body can be considered to be concentrated at the center of mass.

The terms "center of mass" and "center of gravity" are used anonymously in a uniform gravity field to represent the unique point in an object or system which can be used to describe the system's response to external forces and torques.

Its The Center of Gravity .