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)
Deepak singh 1
option b is correct , because if you take any x belongs to irrational then x can not be formed using rational only . So there will be infinite basis and hence infinite dimension.. go through below link for more understanding. https://youtu.be/6ixZJAzMDZw