In The $\beta$ -Oxidation Pathway, the Oxidation Occurs at Carbon _____ with the _____

In the $\beta$ -oxidation pathway, the oxidation occurs at carbon _____ with the acetyl group that becomes acetyl-CoA derived from the _____ end of the fatty acid.

A) 1; carbonyl
B) 1; methyl
C) 2; carbonyl
D) 2; methyl
E) 3; carbonyl