Given below are two statements :

Statement I : Ethyl pent-4-yn-oate on reaction with CH₃MgBr gives a 3$$^\circ$$-alcohol.

Statement II : In this reaction one mole of ethyl pent-4-yn-oate utilizes two moles of CH₃MgBr.

In the light of the above statements, choose the most appropriate answer from the options given below :

Which one of the following reactions will not yield propionic acid?

The structure of the starting compound P used in the reaction given below is :

The major products formed in the following reaction sequence A and B are :