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
option C
Check it
Because in option C Co is tetrahedral and tetrahedral molecules have no centre of sym so it's laporte partly allowed and spin allowed.... so it's give intense color and it's molar absorptivity in the range of 1000 while in in option b it's laporte partly allowed but spin forbidden.... in a and d both laporte forbidden so c give intense color