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(A) The Cannizzaro reaction is a disproportionation reaction given by aldehydes that do not possess an $\alpha$-hydrogen atom.$HCHO$, $Me_{3}CCHO$ (pi

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$Cl_{3}CCHO$

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(A) The Cannizzaro reaction is a disproportionation reaction given by aldehydes that do not possess an $\alpha$-hydrogen atom.$HCHO$, $Me_{3}CCHO$ (pivalaldehyde), and $C_{6}H_{5}CHO$ (benzaldehyde) all lack $\alpha$-hydrogens and thus undergo the Cannizzaro reaction.$Cl_{3}CCHO$ (chloral) also lacks an $\alpha$-hydrogen, but it does not undergo the standard Cannizzaro reaction.Instead, when treated with alkali, it undergoes a haloform-type cleavage because the $CCl_{3}^{-}$ group is an excellent leaving group due to the strong electron-withdrawing effect of the three chlorine atoms, which stabilizes the resulting carbanion.Therefore, $Cl_{3}CCHO$ reacts with alkali to produce chloroform $(CHCl_{3})$ and formate $(HCOO^-)$ rather than undergoing the typical disproportionation of the Cannizzaro reaction.

Amongst the following compounds, the one that will not respond to Cannizzaro reaction upon treatment with alkali is

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