I) The Shias are the followers of Ali who was Muhammad's son-in-law. They believed in Ali and 12 Imams (teachers) to guide the faithful to Paradise. ii) The Sunnis formed the majority and they are the more orthodox group among the Muslims. They recognized the succession of Abu Bakr. iii) The Sufis, the Ismailis, the Wahabis are the other sects of Islam. Hop i helped u :)