Metaphysics is the branch of philosophy that explores the fundamental nature of reality, including the relationship between mind and matter, the nature of existence, and the structure of the universe. While epistemology deals with knowledge and ethics with morality, metaphysics seeks to answer the most basic questions about what it means for something to exist, often transcending empirical observation.

Ethics, or moral philosophy, is the systematic study of what is right and wrong, good and bad. It provides the normative framework necessary for evaluating human actions and social policies. By establishing principles such as justice, fairness, and duty, ethics serves as the foundation for political theory, helping to determine how individuals should interact and how the state should govern its citizens to promote the common good.

The 'Analects' (Lunyu) is the primary collection of dialogues, sayings, and anecdotes attributed to Confucius and his disciples. It serves as the foundational text for Confucian philosophy, detailing his views on ethics, governance, and social harmony.

Mencius, a major Confucian philosopher, expanded upon Confucius's teachings by arguing that human nature is fundamentally good. He believed that humans possess innate moral tendencies—such as compassion and righteousness—that can be cultivated through education and proper social environment. His work remains a cornerstone of Confucian ethics, emphasizing the potential for moral perfection within every individual.

The pairing in option 4 is considered incorrect in academic literature. While Robert Strausz-Hupe and Stefan Possony were influential scholars in the field of international relations and geopolitics, the specific title 'International Relations: A General Theory' is not their primary work. The other pairings correctly identify seminal texts and their respective authors within the discipline of international relations.

E. Sreedharan is the author of 'A Textbook of Historiography: 500 BC to AD 2000', a comprehensive academic text that surveys the development of historical writing from ancient times to the modern era. The book is widely used in history and political science curricula to provide students with a structured overview of historiographical trends and methodologies.

E. Sreedharan is known for his contributions to historical methodology, specifically his manual which outlines the techniques and approaches required for conducting rigorous historical research. This text is widely used in academic circles to guide students through the process of historiography and source analysis.

The sequence provided in option C lists the works as: 1. System and Process in International Politics (Kaplan, 1957), 2. World War-I; An Outline History, 3. New Social Movements, and 4. The Coming Anarchy (Kaplan, 1994). This ordering reflects the historical progression of these specific academic contributions to political science and international relations literature.

The separate communal electorate system was designed to provide specific political representation to religious minorities, most notably Muslims, by allowing them to vote for candidates of their own faith. This system was a significant feature of the Morley-Minto Reforms of 1909, intended to address minority concerns within the colonial political framework.

Machiavelli is considered the first modern political thinker because he broke away from the tradition of normative political philosophy. Instead of focusing on how a state 'ought' to be based on religious or moral ideals, he analyzed politics through the lens of 'realpolitik'. By separating political action from traditional Christian ethics, he established a secular, empirical approach to the study of power and governance.