For SC category the minimun required percentile is 40th. To secure a govt. seat the best marks to get it is anything above 400 under SC category. However, with a score of 240 marks in NEET under SC category you should be able to secure a seat in private medical colleges.

Hey Gursimran Kaur, you have scored 240 marks in SC Category. Really that will be very helpful to you while taking admission in Government College as some special seats are being reserved for each and every special reserved category. Sorry to say, with these marks you cannot get admission to any government college as your marks are quite low for that but yes you can try in private colleges on basis of this. 

 I would personally suggest you use the NEET Predictor and explore various colleges according to your category and home state quota and choose the best one for you as this college will be your future lifeline. It will be best for you as it will provide you the best rank according to your category and marks.

https://medicine.careers360.com/neet-college-predictor?icn=neet-clgpd_landing-page&ici=prediction-section_c360-home