My question is can we give 12th HSC supplementary exam for 1 subject from outside means after taking out LC?
Yes there is a process. You can appear for one subject in July and can clear the exam and get result. In the month of October you can also appear and clear the one subject. But in this case you will get two separate marksheet which the student want to hide their failure. So it will be better for you to appear one time and clear the exam of one subject in AC HSC . Hope for the best.