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)
Ruby negi
first follow authr bieser, and try to complete it, as it contains basic modern ( that is the first stage of Quantum) and nuclear.. then go for introduction of Quantum mechanics by Griffths, it is best book..
blindly trust these two books...
also for jam jest tifr purpose, both books are best..