The correct answer is: c) Sovereign, Socialist, Secular, Democratic Republic
India is a sovereign, socialist, secular, democratic republic. This means that India is a country that is independent and has its own government. It is also a country that is committed to social justice and equality for all citizens, regardless of their religion or beliefs. India is also a democratic country, which means that the government is elected by the people.
A unitary republic is a type of government in which the central government has a great deal of power. The states in a unitary republic have very little power, and they are essentially administrative units of the central government.
A federation is a type of government in which power is shared between the central government and the states. The states in a federation have a great deal of power, and they are not simply administrative units of the central government.
A confederation is a type of government in which the states have a great deal of power, and the central government has very little power. The states in a confederation are essentially independent countries, and they have only agreed to cooperate on certain issues.