Hello Santosh

Ofcourse you can appear in medical entrance exam but to be qualified for the counseling process  it is under rule that the candidate has to pass the class XII with Physics, Chemistry and biology with the minimum percentage required in 12th should not be less than 50 and 45 for reserved categories but if the exams take place after your results are declared and you have still not passed the exam then you won't be eligible for the exam.

Hope it helps you