This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pharmacology
[{'content': 'All these hormones use cAMP as the second messenger except \nSelect and explain. \nA. Coicotropin, B. Dopamine, C. Glucagon, D. vasopressin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Vasopressin is a nonpeptide acting through GQPCR- a type of G protein-coupled cell membrane receptors which act through the phospholipase C-IP3/DAG pathway. (Ref.Essentials of medical pharmacology TD Tripathi 7th edition page no.593)', 'role': 'assistant'}]