The configurations of the reactant and the product in the following reaction,  respectively, are:

Which types of isomerism is shown by $2, 3-$ dichlorobutane

Out of the following which are chiral?

The maximum number of stereoisomers possible for 2-hydroxy- 2-methyl butanoic acid is

Which of the given statement$(s)$ about $N , O , P$ and $Q$ with respect to $M$ is (are) correct?.

$(A)$ $M$ and $N$ are non-mirror image stereoisomers

$(B)$ $M$ and $O$ are identical

$(C)$ $M$ and $P$ are enantiomers

$(D)$ $M$ and $Q$ are identical