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)
Rahul kumar
Have a look at the attached diagram. You can see the different seismic waves travelling through various parts of the Earth. Feel free to ask if you face any difficulties.