The following are multiple choice questions (with answers) about medical knowledge.   **Question:** About giant cell tumor, all are true except:   (A) Commonly presents in the 20-40 year age group   (B) Matrix consists of proliferating mononuclear cells   (C) Osteoclast giant cells constitute the proliferative component of the tumor   (D) It is a benign tumor which may have lung metastasis
['(C) Osteoclast giant cells constitute the proliferative component of the tumor <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Commonly presents in the 20-40 year age group \n (B) Matrix consists of proliferating mononuclear cells \n (C) Osteoclast giant cells constitute the proliferative component of the tumor \n (D) It is a benign tumor which may have lung metastasis <> possible answers', '  About giant cell tumor, all are true except: <> context@']