Statement A is true: One model debated and partially implemented in some areas of post-independent India involved separating regulatory functions (like law and order, revenue collection) from development functions. This aimed to allow administrators to focus specifically on development work without the burden of regulatory duties. Statement B is true: The traditional and long-standing model of district administration in India stipulated combining regulatory and development functions under the District Collector, who was the head of the district administration overseeing various departments. Statement C is true: The Sarkaria Commission on Centre-State Relations examined the role of the District Collector in the context of decentralization. While advocating for strengthening Panchayati Raj Institutions and greater decentralization at lower levels, the Commission recommended maintaining the Collector's position as the chief coordinator of all government activities, including both regulatory and development functions, at the district level. Thus, it recommended a form of unification/coordination at the district level while promoting decentralization below it.