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: Medicine
The characteristic "sulfur grains"of actinomycosis are composed chiefly of 
Select and explain. 
A. Organisms, B. Neutrophils and monocytes, C. Monocytes and lymphocytes, D. Eosinophils
A: Organisms
Answer: A: Organisms 
Explanation: None