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: Social & Preventive Medicine
[{'content': 'The highest concentrations of Vitamin A is seen in – \nSelect and explain. \nA. Polar bear liver, B. Cod liver oil, C. Shark liver oil, D. Papaya', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Amongst the given options, cod liver oil has highest concentration.', 'role': 'assistant'}]