For fatty acid synthesis, Acetyl Co-A comes from mitochondria to cytoplasm as

For fatty acid synthesis, Acetyl Co-A comes from mitochondria to cytoplasm as Citrate.
The biosynthesis of fatty acids is a multi-step process in the cytoplasm, mainly of the liver and fat cells.
Acetyl-CoA, a significant carbon input into the citric acid cycle, can be derived from glucose or fatty acids, however, a substantial portion of acetyl-CoA comes from glucose or more specifically, pyruvate. In the mitochondrial matrix, acetyl-CoA is condensed with oxaloacetate to form citrate through the action of citrate synthase in the tricarboxylic acid cycle.