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: Dental
[{'content': 'Which of the following is/are tuberculides – a) Lichen scrofulosorumb) Lichen nichidusc) Lichen aureusd) Erythema nodosum \nSelect and explain. \nA. b, B. ad, C. ac, D. ab', 'role': 'user'}, {'content': "Answer: B \nExplanation: Now you must be thinking, why have I given erythema nodosum along with Lichen scrofulosorum, whereas in previous explanation only Lichen scrofulosorum was given as the answer. Read below, there will be no confusion.\n\nTuberculids can be classified into two groups:-\n\n1)\xa0\xa0 True (definite) tuberculids\xa0\n\nMycobacterium tuberculosis plays a major etiological role. Examples:- Erythema induration (Bazin's disease), papulonecrotic tuberculid, Lichen scrofulosorum.\n\n2)\xa0\xa0 Facultative tuberculids\n\nMycobacterium tuberculosis is one of the several etiological agents. Examples are:- Erythema nodosum.", 'role': 'assistant'}]