This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition, Subject name: Medicine
[{'content': 'A 23-year-old individual who believes in megavitamins therapy develops severe headche, fundoscopy reveals papilloedema. The likely cause for this problem is - \nSelect and explain. \nA. Vitamin B12 intoxication, B. Vitamin A intoxication, C. Vitamin E intoxication, D. Vitamin K intoxication', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Vitamin A toxicity causes nausea ,increased intracranial pressure and Papilloedema due to high dose of retinol . Ref Harrison 20th edition pg 86', 'role': 'assistant'}]