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
Which hormone does not act through cAMP ? 
Select and explain. 
A. TSH, B. Adrenaline, C. Insulin, D. ACTH
C: Insulin
Answer: C: Insulin 
Explanation: Ans. is 'c' i.e., Insulin