Acetyl CoA carboxylase is activated by: (A) Malonyl CoA, (B) Citrate, (C) Palmitoyl CoA, (D) Acetoacetate
Answer is B. Citrate

Acetyl-CoA carboxylase is an allosteric enzyme, it is activated by citrate and inhibited by long-chain acyl-CoA (palmitoyl CoA).