Hello Snehil
As far as the professional courses are concerned, Delhi University in it's guidelines states that Maths is compulsory to be studied in your class 12th but to include it in your Best 4 or not lies in the hands of students.
Coming to the the courses which SSCBS provides i.e. BBS/BFIA/BBE, for these courses Maths is compulsorily to be studied in your class 12th. This is so because the extended application of the topics you have studied in class 12th is there in these courses.
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