The Madhya Pradesh government onThursday appointed M Gopal Reddy as Officer on Special Duty (OSD) to the Madhya Pradesh chief secretary's office before he takes charge as the state's new chief secretary from April 1.A 1985-batch IAS officer, Reddy will replace current chief secretary Sudhi Ranjan Mohanty (1982 batch), who is retiring from service on March 31, a Mantralaya official said.Reddy currently holds the charge of vice-chairman of the Narmada Valley Development Authority (NVDA).