system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A person has headache & profuse sweating. On examination his B.P is 200/120 mm Hg. Which of the following shoud not be used -a) Nifedipineb) Phenoxybenozamine c) Methyldopad)  Labetalol
assistant
The correct answer is  None