This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pathology
Gomori methenamine silver stain for fungus is shown below. Most likely diagnosis is? 
Select and explain. 
A. Acute angle branching with septate hyphae - Aspergillus, B. Right angle branching and aseptate hyphae- Mucor, C. Acute angle branching with septate hyphae - Mucor, D. Right angle branching and aseptate hyphae- Aspergillus
A: Acute angle branching with septate hyphae - Aspergillus
Answer: A: Acute angle branching with septate hyphae - Aspergillus 
Explanation: Ans. (a) Acute angle branching with septate hyphae - AspergillusMucor- Broad base with obtuse branchingAspergillus- Acute branching, Septate hyphae with narrow base