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: Biochemistry
[{'content': 'The dark adaptation time in Vitamin A deficiency is: \nSelect and explain. \nA. Increased, B. Decreased, C. Unchanged, D. Fluctuating', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Dark adaptation time is increased in vitamin\xa0A\xa0deficient\xa0individuals.\nReference: Satyanarayana- Biochemistry, 3rd edition, pg-121', 'role': 'assistant'}]