Which of the following statements is incorrect?

Three molecules of acetone in the presence of dry $HCl$ form:

Which of the following will be dehydrated most readily in alkaline medium?

Reductive amination of $A$ forms :
$A$ :

Aldehydes and ketones can be reduced to hydrocarbons by using:

Toluene $\xrightarrow[(2) \ H_3O^{+}]{(1) \ CrO_2Cl_2 / CS_2} X$ $\xrightarrow{\text{Conc. } NaOH} Y + Z$. The correct statements about $Y$ and $Z$ are:
$A. \quad Y$ is a secondary alcohol
$B. \quad Y$ is the reduction product of $X$
$C. \quad Z$ on heating with soda lime gives benzene
$D. \quad Y$ does not give $H_2$ gas with $Na$ metal