निम्नलिखित में से किस युग्मन में अनुबंधित उद्दीपक (CS) पहले दिखाई देता है और अननुबंधित उद्दीपक (UCS) के आने पर भी मौजूद रहता है?

Match LIST-I with LIST-II: LIST-I (Classical Conditioning Component) A. Unconditioned Stimulus (US) B. Unconditioned Response (UR) C. Conditioned Stimulus (CS) D. Conditioned Response (CR) LIST-II (Definition) I. The previously neutral stimulus that, after association with the unconditioned stimulus, elicits a conditioned response. II. The learned response to the conditioned stimulus. III. A stimulus that naturally triggers a response without prior learning. IV. The natural, unlearned reaction to the unconditioned stimulus. Choose the correct answer from the options given below:

In classical conditioning, which phenomenon refers to the reappearance of an extinguished conditioned response after a rest period without any further exposure to the conditioned stimulus?