asc wr wbr dear brothers and sisters in islam, This is very important issue. What do u do when u have something very important to learn because u will have ur degree exam? do u base ur answers on the day of the exam on i think or u learn it well b4 the day. Don't think if u don't know study it please for ur own sake. The 73 groups that propohet of allah scw talked about are all muslims and majority of them have already been seen. this is not about names but about believes. ask urself what do u believe? in this hadeeth a companion of the messenger of allah asked the messenger pbuh which group is right? the prophet pbuh replied those who follow what i am on(sunnah) and my companions. we all have to follow the sahaaba. if u don't follow them u will fail ur exam. don't follow anyone else but the messenger of allah pbuh and the sahaabah. Secondly spend at least one hour of ur day on studying islam from reliable sources. Also read the quran if u don't know how to read invest some of ur time u will benefit from it. it's the speach of allah.