This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pharmacology
Which of the following is not used in the treatment of thyroid storm 
Select and explain. 
A. Potassium iodide, B. Reserpine, C. Propanolol, D. Calcium channel blockers
B: Reserpine
Answer: B: Reserpine 
Explanation: Refer Katzung 11/e p 677. Propanolol to control severe cardiovascular manifestations Calcium channel blockers are used if b-blockers are contraindicated as in asthmantics Iodides to inhibit the release big thyroid hormones from the gland