Which of the following statement’s are true?

The presence of chiral carbon is the necessary but not sufficient condition for chirality. If a compound will have the plane of symmetry, a centre of symmetry or alternative axis of symmetry than in spite of the presence of chiral carbon it will be optically inactive. Therefore, statement present in option A is incorrect.

All molecules having two equal chiral C-atoms have 3-stereo isomers because the fourth compound has a centre of symmetry.