Hello Akash

you want to become a veterinary docter.after 12 physics chemistry and biology.you have to apply AIPVT,MHTCET,KEMA after attaineding these exam .you have to score good rank in these exam.on the basis of your rank .you have to call for counsilling in VCI.

for more information .please go through a below given link.you would get a more information -https://www.google.co.in/url?q=https://www.quora.com/Im-in-12th-grade-How-should-I-go-about-to-become-a-veterinary-doctor-in-

Best of luck for future.