This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
[{'content': 'Night blindness may be associated with: March 2004 \nSelect and explain. \nA. Vitamin A deficiency, B. Cirrhosis of liver, C. Malingering, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D i.e. All of the above', 'role': 'assistant'}]