This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
[{'content': 'Eschar is formed in which of the following organism \nSelect and explain. \nA. Baonella henselae, B. Bordetella peussis, C. Bacillus anthracis, D. Escherichia coli', 'role': 'user'}, {'content': "Answer: C \nExplanation: Cutaneous anthrax is caused by bacillus anthrax. The lesion stas as a papule 1-3 days after infection and becomes vesicular, containing a fluid which may be clear or bloodstained. The whole area is congested and edematous, and several satellite lesions filled with serum or yellow fluid are arranged around a central necrotic lesion which is covered by black eschar. The lesion is called a malignant pustule. Ref: Textbook of microbiology; Ananthanarayan and paniker's; 10th Edition; Pg: 250", 'role': 'assistant'}]