Hello Rajesh,

You can go with Science and commerce and then go for Architecture.

Interior designing and architectural are two different course. Interior designing can be done in 3 years or 1 year. And architectural course is compulsory 5 years course

You can choose stream base on your interest. If you take science stream you can directly take up architectural course. But if you take commerce stream, you need to take an entrance for architectural that is NATA. If you clear that you can get admission for architectural.