The Koshi river, a part of India's internal drainage system, has been flowing ever since the ancient period.
A
Holocene
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B
Pleistocene
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C
Pliocene
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D
Miocene
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Solution
The correct option is B Pleistocene The Koshi river, a part of India's internal drainage system, has been flowing ever since the ancient Pleistocene period. The Pleistocene Epoch is typically defined as the time period that began roughly about 2.6 million years ago and lasted until about 11,700 years ago.