Hey Rahul,
As you got 50% in class 12th science there are less chances to get any government college or reputed private colleges but you can try your luck over other colleges. As far as I know you must have appeared for entrance exams like JEE or GUJCET. So, if your makrs are good in them so you will definitely get some good colleges in Mechanical, civil, chemical branches. Hope you find it useful.
Thank you.
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