Karmatar became Vidyasagar after Ishwar Chandra Vidyasagar stayed there for his last 10 yrs of life & developed madhupur & giridih areas. Schools were set up by him. The avatar of Vishnu, Kalki has many avatars. Vidyasagar being one of them. Jasidih will be Baidyanath Dham Junction/BDME & Current Baidyanath Dham Station will be renamed Jasidih Junction/JSME. Just name replacement. Deoghar Junction name will not be changed