Which statements is wrong about symmetry...

Which statements is wrong about symmetry?

Plane of symmetry is an imaginary plane which bisects the molecule in two equal halves in such a way that each half of the molecule is the mirror image of the other half.

Centre of symmetry is the point in a molecule through which if a straight is the point in a molecule through which if a straight line is drawn from any part of the molecule this line encounters identical groups at equal distances in opposite direction.

A molecule which does not prosses any element of symmetry is called asymmetric molecule.

A molecule which does not posses any element of symmetry is called symmetric molecule.

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