Hello shobhit..
u can opt for correspondence as it may not be possible to get admission in regular.
The general rule to take admission in engineering is minimum 50% in 12th science PCM, so you has very less chance to grab engineering seat.
See, Today the situation is such that, in every state, many engineering seats go vacant every year, so to fill that, many times the "Admission committee" of some states decide to lower their criteria
so there are some chances in some places where eligibility criteria is 45% in aggregate
b up i
so have a watch over the eligibility criteria of different college where u want the admission
best of luck..

you have score a below average marks . minimmum marks for applying college is aroung 50% there are less colleges who will get you elligible for the admission. first of all you have to tell me that in which cource you want to take admission. so that i can clear your query. all the best haev a great future ahead.