Meso-tartaric acid is
Optically inactive
Optically active because of molecular symmetry
Optically inactive due to external compensation
Optically active because of asymmetric carbon atom
In which structure central carbon ($C-3$) not chiral centre ?
The isomeric alcohol which has a chiral carbon atom is
Optically inactive compound is
In the reaction $C{H_3}CHO + HCN \to C{H_3}CH(OH)CN$ a chiral centre is produced. This product would be
Correct configuration of the following is