Explanation: Arunachal Pradesh, located in the northeastern part of India, is characterized by its abundant water resources and significant challenges in infrastructural development. The state is part of the Eastern Himalayan region, which experiences heavy rainfall and is home to numerous rivers, including the Brahmaputra and its tributaries. This rich water resource base is a result of the state's geographical location and the monsoon climate it experiences.
However, despite its natural wealth, Arunachal Pradesh faces significant infrastructural challenges. The state's rugged terrain, with steep mountains and dense forests, makes it difficult to build and maintain infrastructure such as roads, bridges, and power supply networks. The remote and scattered population further complicates the development of infrastructure, as it is costly and logistically challenging to provide services to remote areas.
The state's economy is largely dependent on agriculture and forestry, with limited industrial development. The lack of adequate infrastructure hinders economic growth and development, making it difficult to harness the full potential of the state's natural resources. Efforts to improve infrastructure, such as road connectivity and power supply, are ongoing but face numerous obstacles due to the challenging terrain and limited financial resources.
In contrast, other states like Uttar Pradesh, Gujarat, and Haryana have more developed infrastructures, despite their own unique challenges. Uttar Pradesh, for example, has a well-developed road network and significant industrial presence, while Gujarat has made substantial investments in infrastructure, particularly in the energy and transportation sectors. Haryana, being closer to the national capital region, has benefited from the development of infrastructure to support its growing urban and industrial areas.
Therefore, Arunachal Pradesh stands out as the state with abundant water resources but lacking in infrastructural development, making it the correct answer to the given question.