This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
Sulphur granules in actinomycosis consist of 
Select and explain. 
A. Monophils and neutrophils, B. Monophils and lymphocytes, C. Eosinophils, D. Bacterial paicles
D: Bacterial paicles
Answer: D: Bacterial paicles 
Explanation: Sulphur granules are examined microscopically. They are crushed between slides and stained by gram stain and examined. The granules are bacterial colonies and will be found to consist of a dense work of thin gram-positive filaments surrounded by a peripheral zone of swollen, radiating club-shaped structures (antigen-antibody complex) presenting a sun-ray appearance. Ref: Textbook of microbiology; Ananthanarayan and paniker's; 10th edition; Pg:398