Can I get admission in sd for B.Com with 89.6% marks and ut quota I didnt had maths as additional but had nss.

Yes you can try for it.

Yes, you can get admission in SD in B.Com with 89.6 %, as you have ut quota you can surely get admission, and Maths is not required in B.Com mostly, as marks required to get admission in 50 - 60 %, so can get admission. Ut quata is helpful for you as it has reserved your seat in Chandigarh.