Hi Tamana,
It is quite obvious about a government college to have teachers for the courses that the college is offering. The faculties of Interior Design and Decoration Department in Government Girls Polytechnic, Sudhowala are:-
Refer here for staff members list of this college - http://www.ggpdun.com/faculty_member.html
Feel free to ask doubts in the Comment Section.
I hope this information helps you.
Good Luck!