Banaras Hindu University

For admission generally they ask for caste certificate not income certificate. Because reservation for SC or st categories is given on the basis of caste not income.

Still they have asked for income certificate then you can apply for these certificates on Jan seva Kendra and you can get a receipt which you can put at the place 

of caste certificate. And when the caste certificate will be generated you can submit it. They give you undertaking form with the help of that you get some time

to submit your certificates.

You can apply both in main campus and affiliated colleges.

The total fees of the course M.Sc at BHU is around 7k. If you get hostel so you have to pay 2875 for each semester. Mesh charge will be taken per month or diet basis.

Per diet charge in. mess is 50 rupees.

For getting admission in mathematics hons the scores of physics, chemistry and mathematics are evaluated. Only these three are considered for admission and your score should be around 350. 

Yes, General Test is mandatory for B.Com (Hons.) according the subject combination available on BHU website which you can get by searching BHU CUET UG subject combination.

The general aptitude is mandatory and with that business studies and accountancy/book keeping

According to the previous year cutoffs, you will surely get admission.

If you want only BHU then you can give the CUET exam again next time. Because on this score I don't think you will get a seat in BHU even in affiliated colleges. But if you are from sc/st/ph category then there may be a chance. You can register for counseling and see what happens.