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
The sulphur granules in the wound are diagnostic of: 
Select and explain. 
A. Nocardia, B. Actinomyces, C. Clostridium welchii, D. Aspergillus flavum
B: Actinomyces
Answer: B: Actinomyces 
Explanation: Actinomyces