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: Biochemistry
Which of the following is best technique to detect protein structure 
Select and explain. 
A. Electrophoresis, B. X-ray crystallography, C. Mass spectrometry, D. Chromatography
B: X-ray crystallography
Answer: B: X-ray crystallography 
Explanation: X-ray crystallography is the best technique to detect protein structure.