Which of the following reagent$(s)$ is/are used for the given conversion?

Which of the following compounds does $NOT$ undergo haloform reaction?

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

Arrange the following reagents in the correct order in which the above transformation is carried out:

You have two $C_6H_{10}O$ ketones,$I$ and $II$. Both are optically active,but $I$ is racemized by treatment with acid and $II$ is not. Wolff-Kishner reduction of both ketones gives the same achiral hydrocarbon,formula $C_6H_{12}$. What reasonable structures may be assigned to $I$ and $II$ respectively?

Which of the following reactions will not result in the formation of carbon-carbon bonds?