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: Psychiatry
[{'content': 'A patient came to OPD with excessive yawning, lacrimation, hypertension & tachycardia. An examination pupils were found to be dilated. Withdrawl from which of the following has lead to these symptoms? \nSelect and explain. \nA. Cannabis, B. Cocaine, C. Morphine, D. Amphetamine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Withdrawl from opioid compounds like Morphine can lead to excessive lacrimation, sweating, rhinorrhea, yawning, mydriasis, myalgia, hypertension & tachycardia.', 'role': 'assistant'}]