Explanation:

- Tamil Nadu was the pioneering state in India to introduce an RTI (Right to Information) law.

- This move was significant as it set a precedent for transparency and accountability in governance.

- Tamil Nadu enacted its RTI Act in 1997, three years before the central Indian government passed the RTI Act in 2005.

- U.P. is Uttar Pradesh, but it was not the first to introduce such a law.

- Maharashtra followed Tamil Nadu and implemented its RTI Act in 2002.

- Gujarat also enacted its own version of the right to information law before the national law, but not the first.

- Answer: Option 1 - Tamil Nadu

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