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
True about mitochondrial chain elongation of fatty acid is/are 
Select and explain. 
A. Operates under anaerobic conditions, B. Not a common pathway, C. Pyridoxal-phosphate & NADPH is required, D. All of these
D: All of these
Answer: D: All of these 
Explanation: Operates under anaerobic conditions
Fatty Acid Chain Elongation