B.A

Of course, you can do BA after doing diploma in any field.

Both are very renowned distance learning institutes and universities. However, I know many people who passed out from IGNOU and well settled.

Graduation is a must if you seek a position in a good institution. It pays you more. Although, with time it's value has decreased. Now, even a Master's degree doesn't qualify you for a well paying job. You'll need Doctorates and various other qualifications. However, B.A. is the grassroot level of all. And it is definitely advisable to go for it.

You can go for post graduation I.e. MA in one of your graduation subjects or opt for MBA. Apart from that, you can pursue courses in journalism if you have that inclination.

Both BA LLB & BBA LLB have similar opportunities. If you are targeting to become corporate lawyer you may prefer BBA LLB.

There is no law which prohibit simultaneous study of Diploma in Pharmacy and BA as a private candidate. However, if you are doing both under same university, you may have to seek registrar prior permission as some universities discourage this practice.