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 synthesis of fatty acids energy is supplied by: 
Select and explain. 
A. NAD, B. FAD, C. GTP, D. NADPH
D: NADPH
Answer: D: NADPH 
Explanation: D i.e. NADPH