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
Which of the following is absent in breast milk? 
Select and explain. 
A. Iron, B. Vitamin A, C. Vitamin D, D. None of the above
D: None of the above
Answer: D: None of the above 
Explanation: The earlier teaching that human milk is deficient in vitamin D is no longer accepted. Vitamin D is present in human milk in water-soluble form. Human milk contains more vitamin A and vitamin C than cows milk.Recent work shows that iron contained in milk has a high level of bioavailability.Ref: Park; 23rd ed; Pg: 540