The correct answer is (a) Union of States.
A union of states is a political entity that is made up of multiple states or provinces that have united under a central government. The states in a union of states retain a certain degree of autonomy, but they also share power with the central government.
India is a union of states because it is made up of 28 states and 7 union territories. The states have their own governments and legislatures, but they also have to follow the laws of the central government. The central government is responsible for matters such as defense, foreign affairs, and currency.
The other options are incorrect because they do not accurately describe the nature of India’s political system. A federal state is a political entity in which power is shared between the central government and the state governments. A co-operative state is a political entity in which the central government and the state governments work together to achieve common goals. An independent state is a political entity that is not subject to the authority of any other state.