This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
In a thyroid crisis with hyperpyrexia, tachycardia, vomiting, dehydration and shock the following are usually indicated 
Select and explain. 
A. Metaraminol, B. Glucocorticoids, C. Intravenous saline, D. Propranolol
D: Propranolol
Answer: D: Propranolol 
Explanation: A thyroid crisis requires emergency treatment with intravenous fluids, propranolol, hydrocortisone, oral iodine and propylthiouracil or carbimazole