Hii NIharika,

Absolutely not it is not necessary for one to have a bachelor's degree in commerce to pursue an MBA in Finance. You just need to clear the respective exam for the college you want an admit in for pursuing your mba and you are done. You can get all the details regarding pursuing an mba in finance here- https://bschool.careers360.com/articles/mba-in-banking-finance-management

Hope it helps.

Thanks.