What is $X$ in the following reaction?

Consider the following reaction.
$C_6H_5-O-CH_2-C_6H_5 + HI \rightarrow \text{Product}$
Statement $I$ : In the above reaction, the product formed will be a mixture of benzyl alcohol and iodobenzene.
Statement $II$ : In the above reaction, the $-O-CH_2-$ bond is cleaved to give the product.
In the light of the above statements, choose the correct answer from the options given below:

Ethanol when reacts with $PCl_5$ gives $A$,$POCl_3$ and $HCl$. $A$ reacts with dry $Ag_2O$ to form $B$ (major product) and $AgCl$. $A$ and $B$ respectively are

Identify the product $(A)$ of the following reaction:
$C_2H_5-O-C_2H_5 + CO \xrightarrow[500 \text{ atm}]{BF_3 / 150^{\circ}C} A$

Consider the reaction sequence:
Dimethyl ketone $\xrightarrow[(ii) H_2O]{(i) CH_3MgCl} X$ $\xrightarrow[(ii) CH_3Br]{(i) Na} Y$
How many $sp^3$ carbons are present in $Y$?

At $525 \ K$,aromatic ethers do not undergo cleavage by $HI$. Which of the following compounds will not undergo cleavage?