Who had first estimated National income in India?

Correct answer: Dadabhai Naoroji

Explanation: ✅ Correct Answer: A) Dadabhai Naoroji 📚 Explanation: Dadabhai Naoroji was the first Indian intellectual to estimate the national income and per capita income of India in his 1867–1868 work. He calculated that the average annual income of an Indian was a mere 20 rupees. He used this data to formulate his famous 'Drain of Wealth' theory, proving that Britain was systematically draining India's resources. His pioneering work provided an economic basis for the early nationalist movement.