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)
Shashi ranjan sinha
U can prefer, IISC, IISER, IIT Madras, IITBombay and HCU ....in the same order.....I would suggest you this order as preference while opting for institute to do MSc