Which of the following cannot give a yellow $ppt.$ with $I_2/NaOH$?

Which of the following is not an $o, p-$ directing group?

Cannizzaro reaction is an example of:

Benzaldehyde condenses with $N,N$-dimethylaniline in the presence of anhydrous $ZnCl_2$ to give:

Predict the product $B$ in the sequence of reaction:
$HC \equiv CH$ $\xrightarrow{30\% \ H_2SO_4, HgSO_4} A$ $\xrightarrow{dil. \ NaOH} B$

Two compounds $A$ and $B$ with the same molecular formula $(C_{3}H_{6}O)$ undergo Grignard's reaction with methylmagnesium bromide to give products $C$ and $D$. Products $C$ and $D$ show the following chemical tests.

Test	$C$	$D$
Ceric ammonium nitrate Test	Positive	Positive
Lucas Test	Turbidity obtained after five minutes	Turbidity obtained immediately
Iodoform Test	Positive	Negative

$C$ and $D$ respectively are: