Option 1 -> Incorrectly matches Wealth of Nations with 1919 instead of 1776.
Option 2 -> Correctly matches: Wealth of Nations (1776), Economic Consequences of Peace (1919), General Theory (1936), and Great Depression (1929).
Option 3 -> Incorrectly matches Wealth of Nations with 1919 and Great Depression with 1776.
Option 4 -> Incorrectly matches General Theory with 1919 and Economic Consequences with 1936.
Hence, Option 2: (A) - (III), (B) - (I), (C) - (IV), (D) - (II) -> (A) "An Enquiry into the Nature and Causes of the Wealth of Nations" by Adam Smith was published in 1776, marking the foundation of classical economics. (B) "The Economic Consequences of the Peace" by Keynes was published in 1919, criticizing the Treaty of Versailles. (C) "General Theory of Employment, Interest and Money" by Keynes was published in 1936, revolutionizing macroeconomic theory. (D) The Great Depression began in 1929 with the stock market crash. -> correct