Step 1: Evaluating Each Statement about Adam Smith:
(A) He is known as founding father of Modern Economics: This is True. His work laid the foundation for classical free market economic theory.
(B) He authored the Book," Principles of Macro Economics": This is False. His main work was "The Wealth of Nations". "Principles of Macroeconomics" is a generic title for modern textbooks; the field of macroeconomics as a distinct discipline did not exist in his time.
(C) "An Enquiry into the Nature and cause of the Wealth of Nations" is his celebrated work: This is True. Published in 1776, it is his magnum opus.
(D) Adam Smith gave the noted concept of 'Positivism': This is False. Positivism is a philosophical theory primarily associated with the French philosopher Auguste Comte.
(E) He was a professor at the University of Glasgow: This is True. He held the position of Professor of Moral Philosophy at the University of Glasgow from 1752 to 1764.
Step 2: Identifying the Correct Combination:
The true statements are (A), (C), and (E).
Step 3: Final Answer:
The option that includes only the true statements is (B).