This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gram-Positive Infections - Corynebacterial Infections, Subject name: Pharmacology
[{'content': 'Beta blockers are indicated for all of the following conditions except \nSelect and explain. \nA. Hypothyroidism, B. Alcohol withdrawal, C. Portal hypertension, D. Performance anxiety', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (A) Hypothyroidism(Ref: KDT 8th/e p164-165)Beta blockers are used to treat hyperthyroidism (not hypothyroidism).These are the only drugs that offer prophylactic benefits in a patient of varices who has never bled.', 'role': 'assistant'}]