Correct option is A
The correct answer is (a) A-I, B-II, C-III, D-IV.
• A. K.J. Holsti is known for his concept of I. ‘National role conceptions’ in international relations. This concept relates to how state actors perceive their own roles within the international system, which, in turn, influences their foreign policy decisions.
• B. Jonathan Mercer has focused on the interplay between II. ‘Emotion & Cognition-co produce emotions’. Mercer's work delves into how emotions and cognitive processes interact to influence decision-making in the context of international relations, particularly in foreign policy.
• C. Janice Gross Stein is associated with III. ‘Process of Political learning’. Stein's research explores how states and their leaders learn from their experiences in the international arena, impacting their future foreign policy choices.
• D. Arnold Wolfers has described national security as an IV. ‘ambiguous symbol’. Wolfers' contribution to the field of international relations includes the examination of national security, arguing that its meaning can vary widely depending on the context and perception, thus affecting foreign policy in complex ways.