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 substance essential for transfer of fatty acids across mitochondrial membrane: 
Select and explain. 
A. Cera tine, B. Ceratinine, C. Carnitine, D. Coenyzme A
C: Carnitine
Answer: C: Carnitine 
Explanation: C i.e. Carnitine