input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** The main vessel involved in bleeding from Juvenile nasopharyngeal angiofibroma:   (A) Facial aery   (B) Ascending pharyngeal aery   (C) Internal maxillary aery   (D) Anterior ethmoidal aery
output: ['(C) Internal maxillary aery <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Facial aery  (B) Ascending pharyngeal aery  (C) Internal maxillary aery  (D) Anterior ethmoidal aery <> possible answers', '  The main vessel involved in bleeding from Juvenile nasopharyngeal angiofibroma: <> context']