Correct Option: B

The acknowledged high priest of the drain theory was Dadabhai Naoroji. It was in may 1867 that Dadabhai Naoroji put forward the idea that Britain was draining India. From then on for nearly half a century he launched a raging campaign against the drain, hammering at the theme through every possible form of public communication. The drain he declared, was the basic cause of India’s poverty and the fundamental evil of British rule in India.