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': 'Vitamin deficient in breast milk is? \nSelect and explain. \nA. Vitamin A, B. Vitamin B complex, C. Vitamin C, D. Vitamin D', 'role': 'user'}, {'content': 'Answer: C \nExplanation: <p> MILK:- Milk is good source of proteins , fats , sugars, vitamins and minerals. 1. Proteins: chief protein is casein. It occurs in combination with calcium as calcium caseinogenate. The other proteins are lactalbumin and lactoglobulin. Animal milk contains 3 times as much protein as human milk. Milk protein contain all eseential amino acids. Human milk contain greater amount of tryptophan and sulphur containing amino acids. 2. Fat: 3.4 % in human milk. Human milk contain high amount of linoleic acid and oleic acid. Milk fat is a good source of retinol and vitamin D. 3. Sugar: lactose / milk sugar. 4. Minerals 5. Vitamins: all except Vitamin C. {Reference: Park&;s textbook of community medicine, 23 rd edition, pg no. 630}', 'role': 'assistant'}]