The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Pigmentation of nail is caused by all of these drugs except:   (A) Cyclophosphamide   (B) Chlorpromazine   (C) Chloroquine   (D) Amiodarone
['(D) Amiodarone <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Cyclophosphamide \n (B) Chlorpromazine \n (C) Chloroquine \n (D) Amiodarone <> possible answers', '  Pigmentation of nail is caused by all of these drugs except: <> context@']