Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
>



Priyanshu kumar Best Answer
Concept is due to rapid inversion in amine the molecule become achiral ...hence become optically inactive
In compound A and B there is rapid inversion of amine
Hence no chirality...so optically inactive...