List I: Concept	List II: Bodily State
(a) Rebound Phenomena	(i) REM sleep
(b) Phantom Limb	(ii) Pain
(c) Scotopic Process	(iii) Vision
(d) Apoptosis	(iv) Cell death

Correct option is D

This matching correctly pairs physiological concepts with their corresponding bodily states. (a) Rebound phenomena refers to the compensatory increase in REM sleep following REM deprivation (i), a well-documented homeostatic regulatory mechanism. (b) Phantom limb describes the sensation of pain, touch, or movement in an amputated limb (ii), resulting from cortical reorganization and neural memory. (c) Scotopic process involves rod-mediated vision under low light conditions (iii), utilizing rhodopsin photopigment for night vision. (d) Apoptosis is programmed cell death (iv), a genetically regulated process essential for development and cellular homeostasis.

Information Booster:
● Rebound phenomena: Sleep debt compensation; increased REM duration and intensity after deprivation; demonstrates homeostatic sleep regulation
● Phantom limb: Somatosensory cortex reorganization; maladaptive neuroplasticity; experienced by 60-80% of amputees; involves pain, proprioception, temperature sensations
● Scotopic vision: Rod-mediated, operates at <0.01 cd/m²; high sensitivity, low acuity; mediated by rhodopsin; no color perception (achromatic)
● Apoptosis: Programmed cell death vs. necrosis (pathological); involves caspase activation, DNA fragmentation; critical for brain development (neuronal pruning)