I came across the following question :

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My reasoning was as follows :

1. It can't be option (c) because there is no chance of losing a carbon during Cannizzaro's reaction
2. It can't be option (b) because basically option (c) gives (b) finally
3. It can't be option (a) or option (d) because we can't have all carb acid groups or all alcohol groups. we need a combination of both.

So, are the options wrong?