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
In oxidative phosphorylation, the ATP production and respiratory chain are linked by : 
Select and explain. 
A. Chemical methods, B. Physical methods, C. Chemiosmotic methods, D. Conformational changes
C: Chemiosmotic methods
Answer: C: Chemiosmotic methods 
Explanation: C i.e. Chemiosmotic methods