This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
True about western blot: 
Select and explain. 
A. Separation of proteins are based on mass, B. SDS-PAGE electrophesis is used for separation, C. Enzyme linked antibodies are used, D. All
D: All
Answer: D: All 
Explanation: A i.e. Separation of proteins are based on mass; B i.e. SDS-PAGE electrophesis is used for separation; C i.e. Enzyme linked antibodies are used