Step 1: Understanding the Question:
• We must arrange five behaviourist contributions in the order in which they appeared.
Step 2: Detailed Explanation:
• As per the standard textbook sequence followed in the NTA final answer key, the order is: D (Law of effect by Thorndike), C (Associated reflexes by Bekhterev), E (Associative memory by Loeb), A (Conditioned reflexes by Pavlov) and B (Connectionism by Thorndike).
• This gives the sequence D - C - E - A - B.
Step 3: Final Answer:
The correct option is (A) D - C - E - A - B.