input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Submandibular calculus can be removed by:   (A) Dilatation of the duct   (B) Excision of the opening of duct   (C) Removal of the gland   (D) Incision of the duct and removal of calculus
output: ['(D) Incision of the duct and removal of calculus <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Dilatation of the duct  (B) Excision of the opening of duct  (C) Removal of the gland  (D) Incision of the duct and removal of calculus <> possible answers', '  Submandibular calculus can be removed by: <> context']