This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: AIIMS 2017, Subject name: Medicine
First line therapy in anaphylactic shock is: 
Select and explain. 
A. Adenosine 12 mg intravenously, B. Atropine 3 mg intravenously, C. Epinephrine .5 ml of 1:1000 IM, D. Epinephrine 1 ml of 1:10000 intravenously
C: Epinephrine .5 ml of 1:1000 IM
Answer: C: Epinephrine .5 ml of 1:1000 IM 
Explanation: Cause of death in anaphylactic shock is laryngeal edema. Undiluted adrenaline / epinephrine IM 0.5 ml of 1:1000 IM in thigh Option A- For PSVT Option B- For bradycardia Option D- For cardiac arrest