Concept:Nath literature is a medieval religious literary tradition linked to the Nath cult and its yoga practices.Explanation:This literature developed primarily in Bengal. It focuses on the worship of Shiva (Adinath) and the teachings of Nath siddhas like Gorakshanath. It includes both didactic and narrative works. The language used was early Bengali. Therefore, Nath literature is associated with the Bengali language.Answer:Option A – Bengali