The correct sequence of reactions in Krebs cycle is:

Step-by-step solution

Acetyl-CoA donates its acetyl group to the four-carbon compound oxaloacetate to form the six-carbon citrate. Citrate is then transformed into isocitrate, also a six-carbon molecule, which is dehydrogenated with loss of CO 2 to yield the five-carbon compound α − ketoglutarate. The latter undergoes loss of CO 2 and ultimately yields the four-carbon compound succinate and a second molecule of CO 2 . Succinate is then enzymatically converted in three steps into the four-carbon oxaloacetate, with which the cycle began;