Hi, 

D pharmacy is a diploma course which is done after 12th.

So with just D pharmacy you cannot be eligible for neet PG. 

With just D pharmacy you can start a medical store or work under the supervision of a senior licensed pharmacist. 

And pharmaD is a doctorate course of 6years.

It's a 6 years course , 4 years of college, +1 year project and clerkship in hospital + 1 year internship.

After pharmaD however you can work as a clinical pharmacist, drug safety associate etc.

Theres scope in IT sector.

Hope it helps

All the best