hi,

since you are pursuing the three years bsc course from an institution you should choose code 5, which is for candidates who have already passed 10+2 course from a recognized institution and are pursuing 3 years degree course with physics chemistry and biology /biotechnology as compulsory subjects and have qualified in the ist year with practical courses of it. however since you have choose the code 2 , you need to show your 12th school leaving certificate or migration certificate.