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: Microbiology
Which of the following condition causes 'malignant pustule' of the skin during its pathological process? 
Select and explain. 
A. Ulcerating melanoma, B. Rodent ulcer, C. Carbuncle, D. Anthrax of skin
D: Anthrax of skin
Answer: D: Anthrax of skin 
Explanation: The typical lesion of cutaneous anthrax is a painless ulcer with a black eschar (crust, scab) with local edema. The lesion is called a malignant pustule. Must know: B. anthracis is a large "box car-like" gram-positive rod. Its antiphagocytic capsule is composed of D-glutamate. (This is unique--capsules of other bacteria are polysaccharides.) It is non motile, whereas other members of the genus are motile. Anthrax toxin is encoded on one plasmid, and the polyglutamate capsule is encoded on a different plasmid. Pulmonary anthrax, also known as "woolsoer's disease". Ref: Levinson W. (2012). Chapter 17. Gram-Positive Rods. In W. Levinson (Ed), Review of Medical Microbiology & Immunology, 12e.