Hello sunil
You have passed your 12th with 46.5% in medical stream. Now you want to pursue in B.sc Agriculture. For pursuing this course you can join Agricultural colleges through All India quota or you can go for state Government colleges. To take admission in colleges under 15% All India quota you have to appear for ICAR UG exam. You have to secure minimum 50%in 12th in case of General/ OBC NCL while for others it is 40%. For state quota you have to check your respective state Agricultural entrance exam. Hope this helps.
Thank you.