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)
Shreyasi majumdar 1
For part a refer https://www.google.com/amp/s/amp.doubtnut.app/chemistry-question/the-inactivation-of-a-viral-preparation-in-a-chemical-bath-is-found-to-be-first-order-reaction-if-in-141186616