The following species are involved in the formation of an ester from a carboxylic acid in the presence of…

The following species are involved in the formation of an ester from a carboxylic acid in the presence of acid. The correct sequence of formation of these species is

1. 2 1 4 3
2. 1 4 3 2
3. 2 3 1 4
4. 2 3 1 4

Asked in: JEE-TOPICTESTS-CHEMISTRY

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