Two points with this question according to me -
1. Correct idiomatic usage - Adjacent to
2. Correct use of restrictive modifier - Only ( Modifying the closest word - the other state)
Hence I have no doubt about (C)
1. Correct idiomatic usage - Adjacent to
2. Correct use of restrictive modifier - Only ( Modifying the closest word - the other state)
Hence I have no doubt about (C)



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