Detailed Solution:
The correct answer is “A is false but R is true”.
Federalism is a mode of government that combines a general government (the central or federal government) with regional governments (provincial, state, cantonal, territorial, or other sub-unit governments) in a single political system, dividing the powers between the two.
India is a Sovereign Socialist Secular Democratic Republic with a Parliamentary form of government which is federal in structure with unitary features.
India is a federal system but with more tilt towards a unitary system of government. It is sometimes considered a quasi-federal system as it has features of both a federal and a unitary system.