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
The tertiary structure of protein is detected by 
Select and explain. 
A. X-ray diffraction/crystallographs., B. Spectrophotometry, C. Electrophoresis, D. Chromatography
A: X-ray diffraction/crystallographs.
Answer: A: X-ray diffraction/crystallographs. 
Explanation: None