An organic compound $\mathrm{A}\left({\mathrm{C}}_6{\mathrm{H}}_6\mathrm{O}\right)$ gives dark green colouration with ferric chloride. On treatment with ${\mathrm{CHCl}}_3$ and $\mathrm{KOH},$ followed by acidification gives compound $\mathrm{B}.$ Compound $\mathrm{B}$ can also be obtained from compound $\mathrm{C}$ on reaction with pyridinium chlorochromate (PCC). Identify $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}.$

Two compounds $\mathrm{A}$ and $\mathrm{B}$ with same molecular formula $\left({\mathrm{C}}_3{\mathrm{H}}_6\mathrm{O}\right)$ undergo Grignard reaction with methylmagnesium bromide to give products $\mathrm{C}$ and $\mathrm{D}$. Products $\mathrm{C}$ and $\mathrm{D}$ show following chemical tests.

$\mathrm{C}$ and $\mathrm{D}$ respectively are

The major aromatic product $\mathrm{C}$ in the following reaction sequence will be :

The aldehydes which will not form Grignard product with one equivalent of Grignard reagents are
$\left(\mathrm{A}\right)$

$\left(\mathrm{B}\right)$

$\left(\mathrm{C}\right)$

$\left(\mathrm{D}\right)$