Task: Question Answering
Input (English): Question: Insulin regulates the synthesis of fatty acids: 
 Options:  <1> Activating phosphorylase <2> Dephosphorylating acetyl CoA carboxylase. <3> Inhibiting the formation of malonyl CoA. <4> Controlling the carnitine-acyl CoA transferase activity. <5> Activating the fatty acid synthetase.
Output (English): 2