input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A 25-year-old lady presents with sudden severe bilateral loss of vision, more so on the right side, with no perception of light. Rest of the examination including pupillary reflexes, fundus and optokinetic nystagmus are normal. She was able to touch the tips of her fingers with her right eye closed but not with her left eye closed. The most like1 tgnosis is:   (A) Optic neuritis   (B) Anterior ischemic optic neuropathy   (C) CMV retinitis   (D) Functional vision loss
output: ['(D) Functional vision loss <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Optic neuritis  (B) Anterior ischemic optic neuropathy  (C) CMV retinitis  (D) Functional vision loss <> possible answers', '  A 25-year-old lady presents with sudden severe bilateral loss of vision, more so on the right side, with no perception of light. Rest of the examination including pupillary reflexes, fundus and optokinetic nystagmus are normal. She was able to touch the tips of her fingers with her right eye closed but not with her left eye closed. The most like1 tgnosis is: <> context']