Within India, Ganga river basin has the largest catchment area. After that, following is the correct sequence in the decreasing order:
1
Indus > Brahmaputra > Godavari > Krishna
2
Brahmaputra > Indus > Godavari > Krishna
3
Indus > Godavari > Krishna > Brahmaputra
4
Brahmaputra > Indus > Krishna > Godavari