The most common question among 12th students is "what to do after 12th".There are so many carrer/course options after completing 12th.Here I have mentioned some popular and major course that mainly students prefer after completion of 12th .choosing a right carrer options is not easy and it mainly depends on you that what you want to be in future. so just focus on your dreams and forget about what other people says according to your Mark's.
courses after 12th science

courses after 12th:

Medicial line-
. MBBS
. BDS
. BHMS
. BAMS
. B-PHARMA
. BSC.Nursing

Engineering line

. BE,B.tech(Mechanical, chemical, civil, computer science ,Electronics and communication engineering )

Defence line-

. Army
. Navy
. Airforce
. NDA

Management line-

. Bachelor of Business Administration (BBA)
. Bachelor of Business Management (BBM)
. Bachelor of Business studies (BBS)
. Hotel Management
Commercial line-
. B.COM
. B.COM in computer Applications
. B.COM in Accounting
. Charter Accountant
B.SC. line-
. Chemistry
. Physics
. Math
. zoology
. Agriculture
. Biotechnology
Thank you !!