Clemmensen's reduction will convert cyclohexanone into

Which of the following reagents would carry out the following transformation?
$C_6H_5COCH_3 \rightarrow C_6H_5CH(OD)CH_3$ (Note: The product shows a deuterium atom attached to the chiral carbon,not the oxygen).

Chlorotone,used as a medicine,is prepared by the reaction of acetone with .....

The increasing order of the equilibrium constant for the formation of a hydrate from the following compounds is:

Give the chemical conversions for the following:
$(i)$ $2-$Hydroxy$-2-$methylpropanoic acid from acetone
$(ii)$ Ethane from ethanol

In the given reaction $CH_3-CH_2-C(=O)-CH_2-COOC_2H_5$ $\xrightarrow{[X]} (A)$ $\xrightarrow{(i) LiAlH_4, (ii) H_2O/H^{+}} CH_3-CH_2-C(=O)-CH_2-CH_2OH + C_2H_5OH$,$[X]$ will be: