Concept:State-specific legislation related to environmental protection and water resources.Explanation:The bill is officially titled the Arunachal Pradesh Protection of Drinking Water Catchment Areas Bill, 2023.It was introduced to safeguard drinking water sources by regulating activities in catchment areas.The Arunachal Pradesh state assembly passed this bill through a voice vote.Therefore, the state responsible is Arunachal Pradesh.Answer:Option C: Arunachal Pradesh.