input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** All of the following is true about dentinal tubules except:   (A) Inner pulpal layer contains more dentinal tubules than outer dentin layer   (B) The diameter of dentin tubules ranges from 5 to 7μm   (C) The diameter of dentinal tubule is more at pulpal layer than outer layer   (D) The bonding is more difficult on the inner Layer of dentin compared to outer surface
output: ['(B) The diameter of dentin tubules ranges from 5 to 7μm <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Inner pulpal layer contains more dentinal tubules than outer dentin layer  (B) The diameter of dentin tubules ranges from 5 to 7μm  (C) The diameter of dentinal tubule is more at pulpal layer than outer layer  (D) The bonding is more difficult on the inner Layer of dentin compared to outer surface <> possible answers', '  All of the following is true about dentinal tubules except: <> context']