Correct Answer: (d) Adam Smith, Ricardo, J.K. Galbraith
Solution:Classical economics is a broad term that refers to the dominant school of thought for economics in the 18th and 19th centuries. Most consider Scottish economist Adam Smith the progenitor of classical economic theory. Many of the fundamental concepts and principles of classical economics were set forth in Smith's 'An Inquiry into the Nature and Causes of the Wealth of Nations' (1776). Smith argued that free competition and free trade promotes a nation's economic growth. Its other main thinkers are David Ricardo, John Stuart Mill, Jean- Baptiste Say, J.K. Galbraith etc.