The correct option is C Parliamentary democracy
Explanation:
Option (a) is incorrect: In Cooperative federalism, the Centre and states share a horizontal relationship, where they “cooperate” in the larger public interest.
Option (b) is incorrect: In Doctrine of Harmonious Construction, a provision of the statute should not be interpreted or construed in isolation but as a whole, so as to remove any inconsistency or repugnancy. The courts must avoid a clash on contradicting provisions and they must construe the opposing provisions so as to harmonize them.
Option (c) is correct: The real executive power vested in the hands of the council of ministers headed by the Prime Minister is indicative of Parliamentary democracy. It holds the executive accountable in the Parliament.