This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Actinomycetes, Subject name: Microbiology
[{'content': 'Sulphur granules in actinomycosis consists of - \nSelect and explain. \nA. Neutrophils, B. Macrophases, C. Organisms, D. Eosinophils', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Organisms o The diagnosis is most commonly made by microscopic identification of sulphur granules (an in-vivo matrix of bacteria calcium phosphate, and host material). - Harrison 18/e 1329o The sulfur granules are bacterial colonies and will be found to consist of a dense network of thin Gram positive filaments, surrounded by a peripheral zone of swollen radiating club shaped structures, presenting a sun ray appearance. The 'clubs' are believed to be antigen - antibody complexes.", 'role': 'assistant'}]