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
Discharging sinus is seen in - 
Select and explain. 
A. Sporotrichosis, B. Cryp _ococcosis, C. Histoplasmosis, D. Mycetoma
D: Mycetoma
Answer: D: Mycetoma 
Explanation: Ans. is 'd' i.e., Mycetoma . Mycetoma are chronic, slowly progressive infections of the subcutaneous tissue usually of the foot caused by a number of Actinomycetes and filamentous fungi. . The disease usually begins as a small subcutaneous swelling of the foot, which enlarges, burrowing into deeper tissues and tracking to the surface as multiple sinuses discharging viscid, seropurulent fluid containing granules.