Explanation:

- Dadabhai Naoroji

- Known as the "Grand Old Man of India."

- Discussed the concept of poverty in his "Drain Theory."

- Addressed economic impact of British rule in India.

- Emphasized how wealth was being drained from India to Britain.

- ?? Correct Answer

- Jawaharlal Nehru

- India’s first Prime Minister.

- Focused on industrialization and modernization.

- Discussed economic policies but not the first on poverty.

- Indira Gandhi

- Introduced pro-poor programs.

- Known for "Garibi Hatao" (Eradicate Poverty) slogan.

- Not the first to discuss poverty in India.

- Amartya Sen

- Economist known for work on welfare economics.

- Developed concepts on poverty and development.

- Work came much later than Naoroji.