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)
Dinesh khalmaniya 1
II>I>III I show pyramidal inversion so lone pair is not available for donation
III have two N atoms so one of the N atom show -I effect so least basic