pyq/2011/prelims/97

The Brahmaputra, Irrawaddy and Mekong rivers originate in Tibet and flow 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 -

(A) Uplift of folded Himalayan series

(B) Syntaxial bending of geologically young Himalayas

(C) Geo-tectonic disturbance in the tertiary folded mountain chains

(D) Both a and b above