This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Proteins and Amino Acids, Subject name: Biochemistry
[{'content': 'What type of protein is Casein? \nSelect and explain. \nA. Lipoprotein, B. Phosphoprotein, C. Glycoprotein, D. Flavoprotein', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. PhosphoproteinTwo important Phosphoproteins areCasein found in milkOvovitellin found in egg yolk', 'role': 'assistant'}]