Which of the following compounds does not undergo haloform reaction?

$A$ compound,containing only carbon,hydrogen,and oxygen,has a molecular weight of $44$. On complete oxidation,it is converted into a compound of molecular weight $60$. The original compound is:

Consider the reaction:
$RCHO + NH_2NH_2 \rightarrow RCH=NNH_2 + H_2O$
What sort of reaction is it?

$3-\text{Hydroxybutanal}$ is formed when $X$ reacts with $Y$ in dilute $Z$ solution. What are $X, Y$ and $Z$? $(X, Y, Z)$

Assertion $(A)$: Aldehydes are more reactive than ketones towards nucleophilic addition reactions.
Reason $(R)$: In aldehydes,carbonyl carbon is less electrophilic compared to ketones.
The correct answer is

Which compound can reduce Fehling reagent?