This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mycology, Subject name: Microbiology
Madura foot is caused by 
Select and explain. 
A. Parasites, B. Fungal infection, C. Viral infection, D. Bacterial infection
B: Fungal infection
Answer: B: Fungal infection 
Explanation: (Fungal infectiuons): (618 Anant narayan 7th edition; 626-27-Chakraborty 2nd/ caused by)Madura foot or Maduramycosis caused by filamentous fungiImportant Causative agents of mycetoma (557- Baveja 4th)Causative agentColour of the grainsA. Eumycetoma Acremonium falciformeWhite - yellowMadurella mycetomiBlackM. griseaBlackPseudo allescheria boydiiWhite - yellowExophiala jeanselmeiBlackB. Actinomycetoma Actinomadura maduraeWhite -yellowA.pelletieriRedNocardia brasiliensisWhiteStreptomyces somaliensisYellow* Presence of grains in pus or biopsy material is diagnostic*** Mycetoma granules often elicit an immunologic response in tissue called Splendore-Hoeppli reaction"Sulphur granules" section of tissue showing an actinomycotic colony. The clubs at the periphery giving a"sun ray appearance"***