The correct answer is 10°N and 30°N. Explanation & Key Takeaways: • The Ganga-Brahmaputra basin lies between 10°N and 30°N latitudes. • The Ganges and Brahmaputra and their tributaries together form the 'Ganges-Brahmaputra basin' in the Indian subcontinent. • The vast delta of the Sundarbans and the vast Gangetic plain are found here. Where the dense population is found. • This basin is very useful for farming, mainly paddy, maize, sorghum, and millet are cultivated. • Sundarbans forest is famous for the 'Mangrove forest'. • Gokhur Lake or Ox-bow lake is a common feature in the plains. Related Concepts: • Latitude is the angle that ranges from 0 degrees to 90 degrees. • Latitude is imaginary lines that are horizontal. • In India, the southernmost latitudes are 8 degrees and 4 minutes. • 'Cape Camorin' in Kanyakumari is considered to be the southernmost point of India. • The distance between latitudes is equal from the equator to the poles. • Longitude is imaginary lines that are vertical. • Longitude meets at the North and south poles. • The distance between Longitude is not equal from the equator to the poles. • It is minimum at poles and maximum at the equator.