Concept:
This question tests the identification of seminal political and historical texts related to constitutionalism and the Indian independence movement.
Step 1: Verifying Constitutional and Political Texts.
• A. Modern Constitutions: Correctly matched with K.C. Wheare, a famous constitutional expert who also famously described India as "quasi-federal."
• B. Federation versus Freedom: Correctly matched with B.R. Ambedkar. This 1939 text was his critique of the federal scheme proposed in the Government of India Act, 1935.
• D. The Indian War of Independence 1857: Correctly matched with V.D. Savarkar. This book was influential in portraying the 1857 revolt as a planned war for national independence.
• E. The Epic Fast: Correctly matched with Pyarelal (Nayar), Mahatma Gandhi's personal secretary. The book chronicles Gandhi's 1932 fast against the Communal Award.
Step 2: Correcting the Misattributed Pair.
• C. The American Constitution: Cornerstone of a Nation: This is incorrect. Granville Austin wrote the definitive work on the Indian Constitution titled *The Indian Constitution: Cornerstone of a Nation*. He did not write a book with this title about the American Constitution.
Step 3: Final Mapping.
Pairs A, B, D, and E are correct, while C contains a factual error regarding the subject of the book.