Procedding reverse, the structure of `(A)` is `:`
`D.U. ` in `D=1^(@)`, for keto group `(` since, aldehyde is not obtained in oxidation with acidic `KMnO_(4))`.
The structure of `(D)=`
The structure of `(E)=` It is an acid and `D.U. =1^(@)`.
The structures of `(F)` and `(G)`, respectivel, are the following `:`
The structure of `(B)` is `:`
Reaction `:`
