$(X)$ $\&$ $(Y)$ are
Enantiomers
Diastereomers
$E$ $\&$ $Z$ isomer
Constitutional isomer
Which of the following is an chiral compound
Relationship between above pair $(A)$ & $(B)$ is
Which of the following are meso compound?
Which among the following compound show optical activity
$d$ -tartaric acid and meso tartaric acid are