Any candidate who wants to appear for a particular subject which was not a chosen earlier in HSC he can do so by selecting that subject as Isolated subject.

Each candidate gets the chance of taking 2 more attempts after the first exam.so you have two attempts left with you to pass the exam.however if it dont work for you go for on demand NIOS exam where you can apply for particular subject.

Hello,

The number of attempts for HSC are as follows:-

1. Regular candidates typically have a few attempts to pass their HSC exams (usually up to 3 or 4 years in total).

2. Isolated candidates, who often appear privately (without regular school attendance), generally get two or three attempts. This might vary by state or board, so checking with your specific board is important.

Some boards also allow candidates to appear in supplementary or compartmental exams if they fail in one or two subjects.

Since you scored 27 marks (presumably out of 100), you may have the opportunity to reappear in the next exam cycle, depending on your board's regulations.

Hope it helps !