Architects package service

Architects provide services in following 3 categories. Experts detailed views are invited on broad head applicability
1. Pure service i.e. designing, approving designs, certification etc. - 44ADA will be applicable.
2. Pure work contract excluding 1 above such as taking small construction/renovation contracts, interior designing contract etc. - whether business or profession?
3. Giving both services 1 & 2 - whether business or profession?

Audit applicability will also depend upon above.

Thanks in advance.