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 most impoant source of reducing equivalents for fatty acid synthesis in the liver is: 
Select and explain. 
A. Glycolysis, B. TCA cycle, C. Uronic acid pathway, D. HMP pathway
D: HMP pathway
Answer: D: HMP pathway 
Explanation: D i.e. HMP pathway