This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autacoids, Subject name: Pharmacology
[{'content': 'Is 70 year old man was administered penicillin intravenous within five minutes, he developed generalized uicaria, swelling of lips, hypotension and bronchospasm. the first choice is to administer \nSelect and explain. \nA. Chlorpheneramine inj, B. Epinephrine inj, C. High dose hydrocoisone tablet, D. Nebulized salbutamol', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Epinephrine (adrenaline) is a drug of choice for anaphylactic shock. it is given by subcutaneous or intramuscular route in a concentration of 1:1000. intravenous route is rarely used but at match but that much lower concentration(1:10,000) Refer kDT 6/e p128', 'role': 'assistant'}]