Eligibility criteria for the B.Sc. program largely vary from one university to another, depending upon the specialization one has chosen to pursue. Typically, the candidates who have pursued 10+2 (higher secondary) from a recognized board in the Science stream are considered. The common mandatory subjects usually comprise Physics, Chemistry, and Mathematics (PCM) or Physics, Chemistry, and Biology (PCB) in most specializations. In some colleges, an aggregate percentage may be mandatory; this ranges from 50% to 60%.
Some universities may also conduct entrance examinations for admission; elsewhere, only merit-based admissions are followed. Some specializations, such as Biotechnology or Environmental Science, may require subjects as prerequisites, and some private universities may specifically require entrance in certain cases; government colleges would generally follow some standardized eligibility criterion. International students may be asked to submit equivalencies of qualification along with proofs of English language proficiency. It's always advisable to verify the specific requirements of the university where you intend to apply.