Q. The hormone which regulates sleep-wake cycle in man is
A) Oxytocin
B) Vasopressin
C) Thyroxine
D) melatonin
Explanation
The correct answer is Option D: melatonin.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.