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The Brahmaputra, Irrawady and Mekong rivers originate in Tibet and flow it through narrow and parallel mountain ranges in their upper reaches. Of these rivers, Brahmaputra makes a "U" turn in its course to flow into India. This "U" turn is due to
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- Uplift of folded Himalayan series
- Syntaxial bending of geologically young Himalayas
- Geo-tectonic disturbance in the tertiary folded mountain chains
- Both (a) and (b) above
Correct Option: D
NA