Option 1 states that surface water resources are highest in the Ganga plains. The Ganga plains cover a large area in northern India and are known for their fertile soil and agricultural productivity. However, when considering surface water resources, it is not accurate to say that the Ganga plains have the highest resources.

Option 2 states that surface water resources are highest in North-Eastern India. The North-Eastern region of India is rich in water resources due to its hilly terrain and abundant rainfall. It is known for its numerous rivers and waterfalls, including the Brahmaputra, the Barak, and the Meghna rivers. Thus, option 2 correctly identifies North-Eastern India as having the highest surface water resources.

Option 3 states that surface water resources are highest in Peninsular India. The Peninsular region of India is characterized by its plateau and is relatively drier compared to other parts of the country. It is not known for having abundant surface water resources. Therefore, option 3 is not correct.

Option 4 states that surface water resources are highest in the Indus plains. The Indus plains are primarily located in Pakistan and not in India. Therefore, option 4 is not correct.

In conclusion, the correct answer is