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: Dental
[{'content': 'Orogranulocytes are: \nSelect and explain. \nA. Granulocytes present in the gingival connective tissue, B. Mast cells present in the G.C.F, C. P.M.Ns. reaching oral cavity through subepithelium, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]