See image — IUPAC and Nomenclature Chemistry Question

💡 Solution & Explanation

Correct option: \(\text{B}\). The correct choice is \(\text{B}\), 3. Applying the standard IUPAC sequence-parent selection, lowest locants, principal functional group priority, and alphabetical substituent ordering-selects the marked option. Recovered question text: 21. The number of C-atoms in second member of an ester is/are : (A) 2 (B) 3 (C) 4 (D) 1