<prompt> Major metabolic fuel for hea in starvation isGlucoseFree fatty acidsProteinsKetone bodies  <response>: The liver has a greater capacity for b-oxidation than is required to meet its own energy needs, and as fasting becomes more prolonged, it forms more acetyl-CoA than can be oxidized. This acetyl-CoA is used to synthesize the ketone bodies which are major metabolic fuels for skeletal and hea muscle and can meet up to 20 of the brains energy needs. In prolonged starvation, glucose may represent less than 10 of whole body energy-yielding metabolism. Reference: Harper; 30th edition; Chapter 14; Page no: 148 