Product $A$ is$:-$
$H-CHO \xrightarrow[(ii) D_2O]{(i) C_6H_{11}MgBr} A$

Given below are two statements:
Statement $(I)$: The boiling points of alcohols and phenols increase with an increase in the number of $C$ atoms.
Statement $(II)$: The boiling points of alcohols and phenols are higher in comparison to other classes of compounds such as ethers and haloalkanes.
In the light of the above statements,choose the correct answer from the options given below:

Identify $A$ in the given reaction.

$\xrightarrow{{ROH/{H^ + }}}$ $P$ (major organic product)
The product $P$ is

Which of the following compounds is more acidic?

The compound $A$ when treated with ceric ammonium nitrate solution gives a yellow precipitate. The compound $A$ is