Hey Sanjay.

To become an architect the UG course you're required to pursue is B Arch i.e. Bachelors in Architecture. Here is a list of a few top colleges for Architecture in India.

School Of Planning And Architecture, Delhi.

Indian Institute Of Technology, Kharagpur.

IIT Roorkee

Sir J. J. College of Architecture, Mumbai

Birla Institute Of Technology, Mesra.

School of Architecture and Planning, Bhopal

Jadavpur University, Kolkata.

Chandigarh College Of Architecture, Chandigarh.

Jamia Milia Islamia University.