The correct option is B Kodagu
The Bengaluru Urban district is on the first position with the largest population and the Kodagu district occupies the last position with lowest population. Kodagu (also known by its former name Coorg) is an administrative district in Karnataka, India. Before 1956, it was an administratively separate Coorg State, at which point it was merged into an enlarged Mysore State. It occupies an area of 4,102 square kilometres (1,584 sq mi) in the Western Ghats of southwestern Karnataka. In 2001 its population was 548,561, 13.74% of which resided in the district's urban centres, making it the least populous of the 30 districts in Karnataka.