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
What type of protein is Casein? 
Select and explain. 
A. Lipoprotein, B. Phosphoprotein, C. Glycoprotein, D. Flavoprotein
B: Phosphoprotein
Answer: B: Phosphoprotein 
Explanation: Ans. B. PhosphoproteinTwo important Phosphoproteins areCasein found in milkOvovitellin found in egg yolk