Select the Correct Statement About Symmetry Elements:
A) Centre of Inversion

Select the correct statement about symmetry elements:

A) Centre of inversion is a point that is found in between the object and its inverse image; its symbol is C_i.
B) Rotation about a two-fold symmetry axis by 180 $\degree$ leaves the molecule unchanged. The symbol for this axis is C₂.
C) One mirror plane, $\sigma$ , cuts the molecule in two or more identical parts. Only planar molecules have mirror planes.