B.Com

Hello Harish,
Eligibility remains class 12th, but as we're having PCB, there may be some criteria for admission. Actually, every state has its own rules. But it's surely possible. Go to your local college and enquire.

Scope depends on where you have graduated from, how many years of experience, in which company and which division you get your new job.
After FRM, you can work for many types of companies like IT, KPO, Captive, banks, hedge funds, insurance, asset management (Mutual funds), some commodity companies, etc. You will get roles in Business analysis, risk modelling, risk reporting, risk analytics, fund manager assistant or quant developer - last two only if you are in real good luck.

Your choice should depend upon the nature of the job you would like to do or the kind of career you would want to make. However, I would always prefer M.Com first because it would enhance your knowledge of commerce subject that you have chosen and also because MBA can be done even later if you find the need for it. But if you are not interested in making a career related directly to commerce then opt for MBA.

Yes, of course, you can try. What goes into trying? If you are lucky, you can get a good college under DU. But also the entrance matters.

It may be difficult to get admission in B.Com (Hons) degree based on your marks, you may opt for B.Com or BBA for further studies.

It means general B.Com without opting for any specialisation.

Of course, specialization courses will be more effective. It will clear your way for future.