This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Adrenergic System, Subject name: Pharmacology
Propranolol can be used in all of the following conditions except 
Select and explain. 
A. Thyrotoxicosis, B. Variant angina, C. Migraine, D. Hypertension
B: Variant angina
Answer: B: Variant angina 
Explanation: Ans. (B) Variant angina(Ref: KDT 8th/e p161)Propranolol worsens variant angina, due to unopposed a receptor mediated coronary constriction.For indications of b -blockers, refer to text.