The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Which component of cement causes allergic contact dermatitis??   (A) Cobalt   (B) Nickel   (C) Iron   (D) Chromium
['(D) Chromium <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Cobalt \n (B) Nickel \n (C) Iron \n (D) Chromium <> possible answers', '  Which component of cement causes allergic contact dermatitis?? <> context@']