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)
Paramjeet verma Best Answer
Appliy the concept of hard soft acid base theory. Co3+ is hard So it will form stable complex with hard F-. Ag+ is soft, so it will form stable complex with soft I-. So option (d) is correct.