Hello Meenakshi
Government siddha medical college chennai tamilnadu is one of the most reputed government sidhha college in tamilnadu..
It was founded in year 1964.
It is affliated by the tamilnadu , Dr MDR medical university chennai..
As per the previous year cuttoff, the cutoff of siddha college for bsms is lie between 540-640..
But as you know , Every year the cuttoff has beeb change according to the situation, It depends on Number of factors like, I no. Of students appeard in exams and the no. Of seats available,  in siddha medical college, Trinuvali..

Hope this answer will help you to solve your query

Thank-you

And for more information about college counselling you can check this link
https://medicine.careers360.com/articles/neet-counselling/amp