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)
Nidhi taparia
113. Option (1) is the correct answer. Please refer to the attached image for full solution. I denotes the identity matrix where all diagonal elements are equal to 1 and all non-diagonal elements are equal to 0.