Which of the following is a perennial river sustained by Himalayan snowmelt and monsoon rainfall?
Explanation
Correct Answer: Option C — Ganga The Ganga is a perennial river because its Himalayan headstreams receive water from snow and glacier melt as well as monsoon rainfall. Although discharge changes seasonally, the river carries water throughout the year. Its headstream system begins with the Bhagirathi and Alaknanda, which meet at Devprayag. - Option A — Luni: The Luni is a seasonal river of arid western Rajasthan. - Option B — Ghaggar: The Ghaggar is rain-fed and seasonal, with flow weakening in Rajasthan. - Option D — Banas: The Banas is a monsoon-dependent river of Rajasthan and a tributary of the Chambal. Exam Takeaway: Ganga is perennial; Luni, Ghaggar and Banas are strongly seasonal.