In case any student can fail in 12 then reappear exam and pass then he or she will be able to go abroad for mbbs or dental.
Hey,
Failing would not be a problem if you manage to pass in your re-examination. The basic eligibility to study mbbs aboard is to have passed your 12th grade and to have an aggregate of minimum of 50% in your physics, chemistry and biology. You also need to have English as one your mandatory subject in order to pursue mbbs aboard.
Hope this helps.