First, remember my expertise is in becoming an architect in the U.S., not India.
In the U.S., an individual with a BArch would be eligible to become a licensed architect; those with a BArch would only pursue a graduate degree in architecture to for the pursuit of additional knowledge typically a targeted topic. They would NOT need the graduate degree to become licensed.
For you, I am not sure if you NEED to pursue a graduate degree in architecture; do you WANT to pursue a graduate degree in architecture. Certainly, pursuing a graduate degree can only be helpful, but do you have the finances to do so?
To learn more about graduate programs in the U.S., visit http://www.naab.org --.
As you do more research, feel free to ask more specific questions.