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: ENT
A 40 year old diabetic presents with blackish nasal discharge and a mass in the nose, likely diagnosis is: 
Select and explain. 
A. Mucormycosis, B. Actinomycosis, C. Rhinosporiodosis, D. Histoplasmosis
A: Mucormycosis
Answer: A: Mucormycosis 
Explanation: Mucomycosis is an oppounistic infection which is, common in diabetics, presenting with blackish nasal discharge.