Ethane can be obtained from ethanal in one step by

Which of the following is an incorrect match for differentiating the given compounds?

The given alkene undergoes ozonolysis: $2\text{-methylbut-2-ene}$ $\xrightarrow[{(2)\ H_2O/Zn}]{{(1)\ O_3}} \mathop X\limits_{(C_2H_4O)} + \mathop Y\limits_{(C_3H_6O)}$
$X \xrightarrow[{(2)\ H_2O}]{{(1)\ LiAlH_4}} P$
$Y \xrightarrow[{(2)\ H_2O}]{{(1)\ LiAlH_4}} Q$
Which of the following statements is incorrect for $X$,$Y$,$P$,and $Q$?

The product $(A)$ is:

In the reaction scheme shown below,$Q$,$R$,and $S$ are the major products. Identify the correct structure of the products from the given options:
$(P)$ + Succinic anhydride $\xrightarrow{AlCl_3}$ $Q$
$Q$ $\xrightarrow[H_3PO_4]{Zn-Hg/HCl}$ $R$
$R$ $\xrightarrow[(ii) H_3O^+]{(i) CH_3MgBr, (iii) H_2SO_4/\Delta}$ $S$
$(A)$ $S$ is [Structure $A$]
$(B)$ $Q$ is [Structure $B$]
$(C)$ $R$ is [Structure $C$]
$(D)$ $S$ is [Structure $D$]

Product $(C)$ is