This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Tuberculosis, Subject name: Social & Preventive Medicine
[{'content': 'Tuberculin test is - \nSelect and explain. \nA. Subcutaneous, B. Intradermal, C. Intramuscular, D. Subdermal', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Intradermal o In tuberculin test, injection is given intradermally on flexor (ventral) surface of left forearm, mid-wav between elbow & wrist.Intradermal injection of PPDon flexor aspect of forearm | Examined at 48-72 hours |||Induration > 10 mmInduration < 5 mmInduration 6-9 mm|||PositiveNegativeEquivocal | Repeat tuberculin test (two step testing)", 'role': 'assistant'}]