This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mycobacterial Infections, Subject name: Dental
[{'content': 'An 8 years old boy from Bihar presents with a 6 months history of an ill defined, hypopigmented slightly atrophic macule on the face. The most likely diagnosis is: \nSelect and explain. \nA. Pityriasis alba, B. Indeterminate leprosy, C. Vitiligo, D. Calcium deficiency', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Indeterminate leprosy is characterized by: a. Solitary, hypo pigmentary patch over face in a child b. Scaling absent c. Atrophy present d. Patient from endemic area eg Bihar, Jharkhand, Chhattisgarh Differential diagnosis Pityriasis alba Intermediate leprosy Solitary, hypo pigmentary patch over face in a child + + Scaling + - H/O of Atopy + - H/o Atrophy - + Sensation Intact Impaired Histology Spongiosis Perifollicular paraneural lymphocytic infilterate Treatment Self limiting Paucibacillary- multi drug therapy', 'role': 'assistant'}]