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
Drug of choice for anaphylactic shock ? 
Select and explain. 
A. Adrenaline, B. Antihistaminic, C. Glucocoicoids, D. Epinephrine
A: Adrenaline
Answer: A: Adrenaline 
Explanation: Ans. is 'a' i.e., Adrenaline o First adrenaline should be given im to raise the blood pressure and to dilate the bronchi. o If the treatment is delayed and shock has developed, adrenaline should be given i.v. by slow injection.