Which of the following reactants,on reaction | vedclass

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(C) The reaction of phthalaldehyde (benzene$-1,2-$dicarbaldehyde) with concentrated $NaOH$ undergoes an intramolecular Cannizzaro reaction. In this re

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Phthalaldehyde (benzene$-1,2-$dicarbaldehyde)

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(C) The reaction of phthalaldehyde (benzene$-1,2-$dicarbaldehyde) with concentrated $NaOH$ undergoes an intramolecular Cannizzaro reaction. In this reaction,one aldehyde group is oxidized to a carboxylate ion $(-COO^-)$ and the other is reduced to an alcohol group $(-CH_2OH)$. This results in the formation of a hydroxy-carboxylate intermediate. Upon subsequent acidification,the carboxylic acid and the alcohol group undergo an intramolecular esterification (cyclization) to form the lactone,which is phthalide.

Which of the following reactants,on reaction with concentrated $NaOH$ followed by acidification,gives the following lactone as the product?

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