The correct option is Arunachal Pradesh.
Explanation
The question addresses the regional disparity between natural resource endowment-specifically hydrological potential-and the level of infrastructural development required to harness it.
Option Analysis:
- Arunachal Pradesh Arunachal Pradesh: This state is located in the North-Eastern region of India and is part of the Brahmaputra river basin. It possesses the highest hydroelectric power potential in India (often estimated at over 50,000 MW) due to its perennial rivers and mountainous topography. However, due to rugged terrain, difficult accessibility, and environmental sensitivity, infrastructural development (roads, transmission lines, power projects) remains weak compared to its potential.
- Jharkhand Jharkhand: While rich in mineral resources like coal and iron ore, Jharkhand is not primarily characterized by "abundant water resources" in the context of high-head hydroelectric potential compared to the Himalayan states. It has a significant industrial base centered on mining and metallurgy.
- Rajasthan Rajasthan: This state is characterized by an arid and semi-arid climate with a scarcity of water resources, making it incorrect.
- Maharashtra Maharashtra: This state is one of the most industrialized and infrastructurally developed states in India. It has well-developed water resources management and hydroelectric projects (e.g., Koyna), contradicting the "weak infrastructure" criterion.
Key Takeaway: Arunachal Pradesh is known as the "Powerhouse of India" in terms of potential, holding a significant share of the country's hydroelectric capacity, yet it remains under-utilized due to infrastructural and topographical constraints.