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
[{'content': 'Sulphur granules in actinomycosis consist of \nSelect and explain. \nA. Monophils and neutrophils, B. Monophils and lymphocytes, C. Eosinophils, D. Bacterial paicles', 'role': 'user'}, {'content': "Answer: D \nExplanation: 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", 'role': 'assistant'}]