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': 'A 45 year old obese female from Mexico presents to her dermatologist. She noticed that her "hair is falling out." On questioning, she repos having followed a strict fat-free diet. Her alopecia is probably related to a deficiency of which of the following vitamins? \nSelect and explain. \nA. Vitamin A, B. Vitamin C, C. Vitamin D, D. Vitamin E', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Vitamin A', 'role': 'assistant'}]