B.Com

B.Com. is a graduation degree course, and Cabin Crew course is a professional training. It will not add to your education, but it will help you get trained for a particular job role.
Hence there is no harm in doing both simultaneously.
For your convenience, I've listed below the general guidelines a

Yes, dear you can get admission there if you have these quota. There you can use this to get admission.

Eligibility criteria- Passed 10+2 examination with five subjects of 100 marks and English as a subject and any one of the following: Accounting, Business Economics including Business Mathematics, Business Organization, Mathematics, Business Mathematics, Economics, Statistics, Business Studies, Offic

Yes, you can do ICWA which is more beneficial to your career.

Yes, you can get easily admission in St. Xavier's College of Commerce in Kolkata for which you need to take admission in that.

Hello friend,
You can easily take admission in B.Com or BBA with the help of the percentage you have scored in 10 + 2. The only thing that'll matter is the cut-off procedure in the respective college in Chandigarh, which you can confirm from the college.
Good luck.

Look you can choose subjects as get MBA specifications for example if you want to do MBA in finance then you can take finance in B.Com and respectively you can choose your line of B.Com.