Centre of mass is a point

Which is the geometric centre of a body
From which distances of particles are same
Where the whole mass of the body is supposed to be concentrated
Which is the origin of the reference frame

Correct answer: Where the whole mass of the body is supposed to be concentrated

Solution

The centre of mass is defined as the point at which the entire mass of a body can be assumed to be concentrated for analysis of motion. It is not necessarily the geometric centre or the origin of a coordinate system.

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