Do ICAI revise marks of students if there is a mistake in the suggested answers posted by BOS

Whether ICAI consider any changes to be made in the suggested answers (if wrong) and revise the marks of all the students.

As in Nov 19 exams, i am expecting exemption in SFM paper and i asked in my friend circle and no one got the marks as they expected.

This makes me feel that there is something wrong gone behind the valuation process