The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which of the following zone is characterized by macrophages and osteoclasts?   (A) Zone of infection   (B) Zone of contamination   (C) Zone of irritation   (D) Zone of stimulation
['(C) Zone of irritation <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Zone of infection \n (B) Zone of contamination \n (C) Zone of irritation \n (D) Zone of stimulation <> possible answers', '  Which of the following zone is characterized by macrophages and osteoclasts? <> context@']