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
A malignant pustule is seen in infection with 
Select and explain. 
A. Yersinia pestis, B. Bacillus cereus, C. Clostridium welchii, D. Bacillus anthracis
D: Bacillus anthracis
Answer: D: Bacillus anthracis 
Explanation: Cutaneous anthrax: caused by Bacillus anthracis. The lesion stas as a papule 1-3 days after infection and becomes vesicular, containing 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 a black eschar. This is a malignant pustule. Reference: Textbook of Microbiology; Anathanarayan and paniker's; 10th edition; Page no: 249