Which iits or nit take entrance examinations for bsc courses?

Some IITs offer a B.Sc degree . But you will have to be course-specific. IIT Kanpur, for example, offers B.Sc in Physics.

NIIT is one of the leading Co. This offers B.Sc(IT) Course and M.Sc(IT) Course
These degrees are offered to its GNIIT and DNIIT students in Pune.

NIIT has many academic alliances with leading Indian and Foreign Universities.
This institute is specialist in training students in acquiring Hardware skills along with formal course.

The Scope of doing B.Sc or M.Sc in institutes like NIIT's is very good option.

personally also I got a good feedback on this college

NIIT in its official website claims that it is the best coach for the students who are willing to take professional degrees like B.Sc IT and M.Sc IT