This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of lipid, Subject name: Biochemistry
Carnitine helps in 
Select and explain. 
A. Transpo of fatty acids from mitochandria to cytosol, B. Transpo of fatty acids from cytosol to mitochandria, C. Transpo of pyruvate into mitochandria, D. Transpo of Malate in Malate shuttle
B: Transpo of fatty acids from cytosol to mitochandria
Answer: B: Transpo of fatty acids from cytosol to mitochandria 
Explanation: Fatty acids are activated in the cytoplasm, but the beta-oxidation is in mitochondria. So transpo of fatty acids through the mitochondrial membrane is essential. The long chain fatty acyl CoA cannot pass through the inner mitochondrial membrane. Therefore a transpoer, carnitine is involved in transfer of fatty acids. Carnitine is beta-hydroxygamma- trimethyl ammonium butyrate,Ref: DM Vasudevan - Textbook of Biochemistry, 6th edition, page no: 131