input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Decay of enamel following radiotherapy is initiated due to:   (A) Decrease in salivary flow   (B) Direct radiations contacting the enamel   (C) Dessication of tooth structure   (D) Hypocalcification and pitting of enamel
output: ['(A) Decrease in salivary flow <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Decrease in salivary flow  (B) Direct radiations contacting the enamel  (C) Dessication of tooth structure  (D) Hypocalcification and pitting of enamel <> possible answers', '  Decay of enamel following radiotherapy is initiated due to: <> context']