Hey!

Since you have not mentioned the name of exam you are asking about , i consider you are asking the minimum marks needed for ST student to get admission in any college of kerala.

Then let me tell you that the cutoffs are different for two quotas - all india quota and state quota. Also , the cutoffs fluctuate every year. But if we consider the previous year cutoffs , then the minimum score under state quota is 280 , while under all india quota , the minimum score is 400 . 

Since this year the cutoffs are most likely to be higher than the previous year , so this year you can expect a minimum score of 310 and 450 under state quota and AIQ respectively.

To know the previous year cutoffs of all colleges of kerala , follow the given link :

https://medicine.careers360.com/articles/neet-cutoff-kerala