The correct answer is the Brahmaputra. • The Brahmaputra originates in Tibet. The Ganga • Origin: Gangotri glacier near Gaumukh (3,900 m) in the Uttarkashi district of Uttarakhand. • Here, it is known as the Bhagirathi. • The river has a length of 2,525 km. • It is shared by Uttarakhand (110 km) and Uttar Pradesh(1,450 km), Bihar (445 km), and West Bengal (520 km). • The Ganga basin covers about 8.6 lakh sq. km area in India alone. • The Ganga river system is the largest in India. • The Son is its major right-bank tributary. • The important left-bank tributaries are the Ramganga, the Gomati, the Ghaghara, the Gandak, the Kosi, and the Mahananda. • The river finally discharges itself into the Bay of Bengal near Sagar Island. The Yamuna • Origin: Yamunotri glacier on the western slopes of the Banderpunch range (6,316 km). • It is the westernmost and the longest tributary of the Ganga. • It joins the Ganga at Prayag (Allahabad). • It is joined by the Chambal, the Sind, the Betwa, and the Ken on its right bank. • It is joined by the Hindan, the Rind, the Sengar, the Varuna, etc. join it on its left bank. The Brahmaputra • Origin: Chemayungdung glacier of the Kailash range near the Mansarovar lake in Tibet. • In Tibet, it is known as the Tsangpo, which means ‘the purifier.’ • The Rango Tsangpo is the major right-bank tributary of this river in Tibet. • It enters India west of Sadiya town in Arunachal Pradesh. • Flowing southwest, it receives its main left-bank tributaries, viz., Dibang or Sikang, and Lohit; thereafter, it is known as the Brahmaputra. • The Brahmaputra enters Bangladesh near Dhubri and flows southward. • In Bangladesh, the Tista joins it on its right bank from where the river is known as the Jamuna. • It finally merges with the river Padma, which falls in the Bay of Bengal. The Godavari • Origin: Nasik district of Maharashtra. • The Godavari is the largest Peninsular river system. • It is also called the Dakshin Ganga. • It discharges its water into the Bay of Bengal. • Its tributaries run through the states of Maharashtra, Madhya Pradesh, Chhattisgarh, Telangana, Odisha, and Andhra Pradesh. • It is 1,465 km long with a catchment area spreading over 3.13 lakh sq. km. • The Penganga, the Indravati, the Pranhita, and the Manjra are its principal tributaries.