This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Due to fear which of the following hormones increases rapidly? 
Select and explain. 
A. Growth hormones, B. Epinephrine, C. Corticosteroid, D. Thyroid hormone
B: Epinephrine
Answer: B: Epinephrine 
Explanation: Adrenaline increases the activity of brain. Adrenaline secretion increases during ‘fight or flight reactions’ after exposure to stress. It enhances the cortical arousal and other facilitatory functions of central nervous system.
Reference: Essentials of Medical Physiology K. Sembulingam, Prema Sembulingam 6th ED P:442