The correct answer is: a) Brahmaputra and its tributaries.
The Brahmaputra River is the largest river in India and the third largest river in Asia. It flows through the states of Arunachal Pradesh, Assam, Meghalaya, and West Bengal. The Brahmaputra and its tributaries have a hydropower potential of over 50,000 MW.
The Barak River system is the second largest river system in Meghalaya. It flows through the states of Assam and Meghalaya. The Barak River system has a hydropower potential of over 10,000 MW.
The Teesta River is a tributary of the Brahmaputra River. It flows through the states of Sikkim, West Bengal, and Assam. The Teesta River has a hydropower potential of over 3,000 MW.
The Subansiri River is a tributary of the Brahmaputra River. It flows through the states of Arunachal Pradesh and Assam. The Subansiri River has a hydropower potential of over 2,000 MW.
The Brahmaputra River and its tributaries offer the highest hydropower potential in Meghalaya because they are the largest and most powerful rivers in the state. The Brahmaputra River is the third largest river in Asia, and its tributaries are also large and powerful. The Brahmaputra River and its tributaries have a hydropower potential of over 50,000 MW, which is more than the hydropower potential of all the other rivers in Meghalaya combined.