Explanations:The question asks which of the given rivers is not a river of India. To answer this, it is essential to understand the geographical distribution of rivers and their locations within the Indian subcontinent.
The Brahmaputra, Ganges, and Yamuna are all significant rivers that flow through India. The Brahmaputra originates in Tibet and flows through Arunachal Pradesh and Assam before joining the Ganges in Bangladesh. The Ganges is one of the most important rivers in India, flowing through several states including Uttarakhand, Uttar Pradesh, Bihar, and West Bengal. The Yamuna is a major tributary of the Ganges, originating from the Yamunotri Glacier in Uttarakhand and flowing through several states before merging with the Ganges at Allahabad.
On the other hand, the Mekong River is not a river of India. It is a major river in Southeast Asia, flowing through China, Myanmar, Thailand, Laos, Cambodia, and Vietnam. The Mekong River is the longest river in Southeast Asia and is not associated with the Indian subcontinent. Therefore, the Mekong River is the correct answer to the question as it is the only river listed that does not flow through India.
Understanding the geographical distribution of rivers is crucial for identifying which rivers are part of the Indian river system and which are not. This knowledge is important for various geographical and environmental studies, as well as for competitive examinations that test geographical knowledge.