The major product in the following reaction sequence is

$$ \text { Match the following } $$

$$ \begin{array}{llll} \hline & \begin{array}{c} \text { List-I } \\ \text { (Reaction) } \end{array} & & \begin{array}{c} \text { List-II } \\ \text { (Product) } \end{array} \\ \hline \text { A. } & \text { Ketone }+\mathrm{NaBH}_4 & \text { I. } & 1^{\circ} \text { - alcohol } \\ \hline \text { B. } & \text { Ester }+\mathrm{LiAlH}_4 & \text { II. } & 3^{\circ} \text { - alcohol } \\ \hline \text { C. } & R \mathrm{Mg} X+\text { Ketone } & \text { III. } & 2^{\circ} \text { - alcohol } \\ \hline & & \text { IV. } & \text { Alkane } \\ \hline \end{array} $$

$$ \text { The correct match is } $$

The reaction of one mole of 3-ethyl-3-methylpenta-1, 4-diene with $\mathrm{O}_3$ and then with $\mathrm{Zn} / \mathrm{H}_2 \mathrm{O}$, gives

Which of the following reactions gives carboxylate ion in their reaction mixture?