This is Nalin Khandelwal(1st year MAMC) who's celebrating his Neet result by Hugging his parents as he had Promised that he'll going to achieve a good result. . And to achieve this dream he used to follow a 24 hour(diurnal) rhythm of his sleep-wake cycle which was regulated by the hormone? #ParentsSePyaarKaro

A) Calcitonin
B) Melatonin
C) Adranaline
D) Prolactin


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