Product of the reaction is

Which is not true about acetophenone?

Assertion $(A)$: Ammonia and its derivatives of the form $H_2N-Z$ undergo condensation reaction with carbonyl compounds (aldehydes and ketones).
Reason $(R)$: This reaction is an example of an irreversible reaction.
The correct option among the following is:

Which of the following gives an alcohol and salt of carboxylic acid when reacted with conc. $NaOH$?

$A$ $(C_3H_6O)$ $\xrightarrow{NaCN/H_2SO_4}$ cyanohydrin of $A$. If the cyanohydrin is optically active,then the possible structure of $A$ is:

Which of the following reactions is preferentially used to prepare the corresponding alkanes from alkanones?