The above conversion can be carried out by:

Given below are two statements: One is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$ : $Image-I$ can be easily reduced using $Zn-Hg / HCl$ to $Image-II$.
Reason $R : Zn-Hg / HCl$ is used to reduce carbonyl group to $-CH_2-$ group.
In the light of the above statements,choose the correct answer from the options given below:

Which one of the following compounds is the best choice for being prepared by an efficient mixed aldol addition reaction?

Which one of the following is not formed by aldol condensation of a mixture of ethanal and propanal?

Which of the following compounds undergo Cannizzaro reaction?
$(a)$ $HCHO$
$(b)$ $C_6H_5-CHO$
$(c)$ $CH_3-C(CH_3)_2-CHO$
$(d)$ $Ph-CH_2-CHO$

Which of the following is a lachrymatory agent or tear gas?