Benzene on reaction with acetyl chloride in the presence of anhydrous $\mathrm{AlCl}_3$ gave the product $P$. The product $P$ on reaction with methylmagnesium bromide followed by treatment with water furnished the product $Q$. The molecular formula of $Q$ is

$$ \text { Match the following. } $$

In the following compounds, the ones that give positive iodoform test are

Propyne was subjected to a reaction with $\mathrm{HgSO}_4 /$ dil. $\mathrm{H}_2 \mathrm{SO}_4$, which resulted in a product $P$. The product $P$ was heated with $\mathrm{Ba}(\mathrm{OH})_2$ to give the product $Q$. The molecular formula of the product $Q$ is