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

Sodium tertiary butoxide or reaction with methyl bromide produced the product $P$. Sodium methoxide upon reaction with tertiary butyl bromide generated the product $Q$. The products $P$ and $Q$ are

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

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