This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and health, Subject name: Social & Preventive Medicine
[{'content': 'In comparison to Cow milk, human milk has low contents of all except - \nSelect and explain. \nA. Sodium, B. Chloride, C. Protein, D. Iron', 'role': 'user'}, {'content': "Answer: D \nExplanation: There is no iron in human milk. In cows milk 0.2mg of iron is present per 100g. REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO - 582)", 'role': 'assistant'}]