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
A diabetic patient presents with pus from the eye. Colonies of isolated organisms are grey-white with a microscopic feature of non-septate hyphae and obtuse branching. Diagnosis is 
Select and explain. 
A. Aspergillosis, B. Candidiasis, C. Mucormycosis, D. Histoplasmosis
C: Mucormycosis
Answer: C: Mucormycosis 
Explanation: Mucor, Rhizopus, lichthemia are associated with mucormycosis. Primary infection is usually in upper respiratory tract or nose spreading the infection to orbit, paranasal sinuses, brain. On microscopy, specimen shows non-septate hyphae. In SDA medium the colonies are grey-white with a thick cotton fluffy surface. Ref: Baveja textbook of microbiology; 4th edition