Hello pravin, congratulations on your score! Well done! So as you told you have completed your 12th hsc exam in science exam.. you do BTECH by taking any course from it.. you can also do BCA ie: bachelor in computer application.. both have good scope in future.. it you are intrested in doing anything innovative you can do btech in mechanical or electrical or cse.. 

both have good scope and good job opportunities 

all the best