The answer u r looking for is- A, Vestibulocochlear. Hope I’ve helped ;)
arsenic
Nitrogen group element, any of the chemical elements that constitute Group 15 (Va) of the periodic table. The group consists of nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), bismuth (Bi), and moscovium (Mc).
So, when our eyes see light, our brain gets signals that make us feel awake. But when its dark, the signals make us feel tired. ... When your body releases more melatonin, you feel more tired. The human body starts releasing melatonin in the evening around bedtime and continues throughout the night.
I hope that answers your question