input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Frankfort - horizontal is a reference plane constructed by joining which of the following landmarks?   (A) Nasion and Sella   (B) Porion and Sella   (C) Porion and Nasion   (D) Porion and Orbitale
output: ['(D) Porion and Orbitale <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Nasion and Sella  (B) Porion and Sella  (C) Porion and Nasion  (D) Porion and Orbitale <> possible answers', '  Frankfort - horizontal is a reference plane constructed by joining which of the following landmarks? <> context']