Hello student,
It's difficult to predict the exact possibilities of admission. It depends upon the cut-off. Cut-off changes every year. It depends upon a lot of factors such as the exam pattern, the number of students appeared, the exam difficulty level, the highest score, whether you belong to any category or not. It also varies from state to state.
However, with 12120 NTA SC rank , you should get admission in DTU, NSU , this data is based upon Last year's cut-off. Last year the cutoff rank for electrical engineering was 25694 and for civil engineering it was 31521.
To get an exact idea about which college you might get you can check the link mentioned below
https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer
JEE Main Rank Predictor - Know your expected IIT JEE Main 2020 Rank by ...
Hope it helps
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