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: Social & Preventive Medicine
[{'content': "Regarding schick's test which of the following is false \nSelect and explain. \nA. Erythematous reaction in both arms indicates, B. Positive test means that person is immune to hypersensitivity diphtheria, C. Diphtheria antitoxin is given intradermal, D. None of the above", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]