Solution:‘Silsila’ is an Arabic word meaning chain, link, connection often used in various senses of lineage. In particular, it may be translated as ‘spiritual genealogy’ where one Sufi Master transfers his khilfat to his spiritual descendant.
The origins of Sufism can be traced to the lifetime of the Prophet Muhammad, whose teachings attracted a group of scholars who came to be called ‘Ahle Suffe’, the People of Suffe, from their practice of sitting at the platform of the mosque of the Prophet in Medina.
They engaged themselves in discussions concerning the reality of ‘Being’, and in search of the inner path and devoted themselves to spiritual purification and meditation. These individuals were the founders of Sufism.
Four important Silsilas are: Chishti Silsila, Kadri Silsila and Soharvardi Silsila and Nakshbandi Silsila. Hence, all the statements are correct.