AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
(B) Both A and R are true, but R is NOT the correct explanation of A.
Assertion A is true — linguistic States actually made the country more united and administration easier. Reason R is also true — national leaders did initially fear disintegration. However, R describes the initial resistance, not an explanation for why unity was strengthened.
The key is: R is a historical fact (leaders feared disintegration) but it does not explain why linguistic States strengthened unity — it is the opposite concern. The text states "the experience has shown that the formation of linguistic States has actually made the country more united," which is the actual explanation for A. So both statements are independently true but R does not logically explain A — hence option (B).