Identify the major product of the following reaction:

The product obtained as a result of the reaction between acetone and chloroform is used as:

Preparation of looking mirrors involves the use of

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

$\alpha-H$ containing aldehyde and ketone reacts with dil $NaOH$ and gives $\beta-hydroxy$ aldehyde or $\beta-hydroxy$ ketone. This reaction is called $-$

The option$(s)$ with the correct sequence of reagents for the conversion of $P$ to $Q$ is(are):
$(A)$ $i$) Lindlar's catalyst,$H_2$; $ii$) $SnCl_2 / HCl$; $iii$) $NaBH_4$; $iv$) $H_3O^{+}$
$(B)$ $i$) Lindlar's catalyst,$H_2$; $ii$) $H_3O^{+}$; $iii$) $SnCl_2 / HCl$; $iv$) $NaBH_4$
$(C)$ $i$) $NaBH_4$; $ii$) $SnCl_2 / HCl$; $iii$) $H_3O^{+}$; $iv$) Lindlar's catalyst,$H_2$
$(D)$ $i$) Lindlar's catalyst,$H_2$; $ii$) $NaBH_4$; $iii$) $SnCl_2 / HCl$; $iv$) $H_3O^{+}$