Identify the missing reagent in the reaction given below

Identify the missing reagent in the reaction given below

1. Diethyl carbonate $(\mathrm{EtO})_{2} \mathrm{C}=\mathrm{O}$
2. Ethyl acetate $\mathrm{CH}_{3} \mathrm{COOEt}$
3. Ethyl formate $\mathrm{HCOOEt}$
4. Diethyl oxalate Et. OOC. COOEt

Asked in: JEE-TOPICTESTS-CHEMISTRY

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