When and where Panchayati Raj system in India was introduced ?

• A. July, 5, 1957 : Firozabad (U.P)
• B. October 2, 1959 ; Nagar (Rajasthan)
• C. November 14, 1959 ; Ahmedaba (Gujarat)
• D. December 3, 1960; Bhopal (M.P.)