Correct Answer: Dadabhai Naroji .

Solution : The correct option is - Dadabhai Naroji .

The Drain of Wealth theory was first put forth by Dadabhai Naoroji in 1867. Due to his six decades of involvement in the Indian national movement, he was known as the Grand Old Man of India. The economic imperialism theory, contends that British economic policies are utterly draining India. He made reference to this thesis, often known as the Drain Theory in his book Poverty and Un-British Rule in India.