This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pituitary-Hypothalmic System and Thyroid, Subject name: Pharmacology
[{'content': 'Anti-thyroid drug of choice for thyroid storm is:- \nSelect and explain. \nA. Thiocyanates, B. Propylthiouracil, C. Propanolol, D. Radioactive iodine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Thyroid storm is an extreme form of thyrotoxicosis. The drugs used in thyroid storm are: Propanolol to control severe cardiovascular manifestations. It is life saving drug in thyroid storm and is DOC. CCBs like Diltiazem are used, if beta-blockers are C/I (as in asthmatics). Propylthiouracil is used to reduce the synthesis of thyroid hormones. It is anti thyroid DOC for thyroid storm. Hydrocoisone is used to protect the patient against shock.', 'role': 'assistant'}]