Which one of the following reacts with $HCN$ and Tollen's reagent,but is not oxidised by Fehling's solution?

Which of the following on reaction with Grignard reagent followed by hydrolysis forms a secondary alcohol?

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

$3$-hydroxybutanal is formed when $(X)$ reacts with $(Y)$ in dilute $(Z)$ solution. What are $X, Y$ and $Z$?

Which of the following statements regarding the chemical properties of acetophenone is incorrect?
$I.$ It is reduced to methyl phenyl carbinol by sodium and ethanol.
$II.$ It is oxidized to benzoic acid with acidic $KMnO_4$.
$III.$ It does not undergo electrophilic substitution reactions (like nitration at the $m$-position).
$IV.$ It does not give the iodoform test with iodine and alkali.

The products $(A)$ and $(B)$ respectively in the above reaction are: