greetings shiv,

by this time you might not have receive your original marksheet but you will receive it soon.

in the meanwhile, you can submit the provisional certificate given by your school and give an undertaking to submit the marksheet as soon as you receive it and specify a date.

once you receive the marksheet from from school, kindly submit it. also submit before the mentioned date else your candidature might be cancelled.

hope this helps.

good luck.