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
1>2>3 1 has no effect, 2nd and 3rd have -I effect on N atom so less basic. -I effect O>N so 3rd is least basic