Hey Sanjulata,
According to your 12th marks i.e. 241 marks if you have these marks in total 5 subjects then your 12th percentage would be around 48% or so.

A government college asks for minimum 50% marks (45% marks for reserved category candidates) in the qualifying examination for admission, so it is going to be somewhat difficult for admission to a government college. But if a college conducts entrance exam for admission to the BSc course and if you belongs to reserved category then there are chances for your admission.
Good Luck!