The correct sequence in the Krebs cycle is:

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(D) The Krebs cycle (also known as the Citric Acid Cycle) involves a series of enzymatic reactions. Starting from Isocitric acid,it undergoes oxidativ

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Isocitric acid $\rightarrow \alpha$-ketoglutaric acid $\rightarrow$ Oxaloacetic acid

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(D) The Krebs cycle (also known as the Citric Acid Cycle) involves a series of enzymatic reactions. Starting from Isocitric acid,it undergoes oxidative decarboxylation to form $\alpha$-ketoglutaric acid. Subsequently,$\alpha$-ketoglutaric acid undergoes further reactions to eventually regenerate Oxaloacetic acid,which is the starting substrate for the cycle. Therefore,the correct sequence among the given options is: Isocitric acid $\rightarrow \alpha$-ketoglutaric acid $\rightarrow$ Oxaloacetic acid.

Column-$I$	Column-$II$
$A$. Oxaloacetate	$p$. $6-C$ compound
$B$. Phosphoglyceraldehyde	$q$. $5-C$ compound
$C$. Isocitrate	$r$. $4-C$ compound
$D$. $\alpha$-Ketoglutarate	$s$. $3-C$ compound
	$t$. $2-C$ compound

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