Which of the following product form when ${\mathrm{CH}}_3\mathrm{MgBr}$ reacts with ${\mathrm{CO}}_2$?

What is final product of the reaction?

The correct order of reactivity of $\mathrm{PhMgBr}$ with the following compounds will be.

$$\begin{gathered} {\left({\mathrm{C}}_6{\mathrm{H}}_5\right)}_2\mathrm{CO} \\ \left(1\right) \end{gathered}$$           $$\begin{gathered} {\mathrm{CH}}_3-\mathrm{CH}=\mathrm{O} \\ \left(2\right) \end{gathered}$$        $$\begin{gathered} {\left({\mathrm{CH}}_3\right)}_2\mathrm{C}=\mathrm{O} \\ \left(3\right) \end{gathered}$$                

Product of following reaction is:

The product $\left(\mathrm{Z}\right)$ of the above reaction is: