Question

Which of the following is not a Himalayan river ?
(A) Ganga
(B) Indus
(C) Brahmaputra
(D) Mahanadi

Answer 1

Hint: The rivers which derive from the Himalayan mountain ranges are the Himalayan Rivers. These rivers are fed with snow; from the melting ice of the glaciers as well as from the rainfall, they get warmth.

Complete answer:
Indus Ganga Brahmaputra basins extend across the southern slopes of the Himalayan range. All the basins extend across multiple countries; the river systems have distinct climate and flow regimes influenced to an outsized extent by the summer and winter. However Mahanadi River flows through the states of Chhattisgarh and Odisha. It rises within the highlands of Chhattisgarh and therefore the total length of Mahanadi is about 860 kilometre. It flows mainly in Odisha. It's bounded on the north by the Central India hills, on the south and east by the Eastern Ghats and on the west by the Maikala range. Mahanadi is joined by the tributaries like Seonath, Jonk, Hasdo, Mand, Lb etc. Its geographic region is shared by Maharashtra, Chhattisgarh, Jharkhand and Odisha. The Mahanadi is one amongst the most important east flowing peninsular rivers draining into Bay of Bengal. Peninsular rivers are seasonal rivers and enthusiastic about rainfall. During dry seasons, the rivers get dried up. Mahanadi valley is popularly known for its fertile soil and flourishing agriculture. The Hirakud dam is made across river Mahanadi.

Therefore the correct answer is option (D) Mahanadi.

Note: The Peninsular rivers flow in comparatively shallow valleys. These are more or less completely graded valleys. Peninsula rivers are much older than the Himalayan rivers. These rivers have drained onto one of the world's oldest plateaus and have reached maturity.