AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
Answer: (A)
Both A and R are true, and R is the correct explanation of A. After 1990, the rise of regional parties and coalition governments led to a new culture of power sharing and greater respect for State autonomy, making federal power sharing more effective.
Source: Federalism, Centre-State Relations — Chapter 2
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The textbook explicitly states: "This period saw the rise of regional political parties… the beginning of the era of coalition governments… This led to a new culture of power sharing and respect for the autonomy of State Governments… federal power sharing is more effective today than it was in the early years." This directly links the Assertion to the Reason, making (A) the correct choice. Both statements are true, and R directly explains why A is true.