Find out the $X$ of the given reaction :-

The major product formed when propene reacts with $HBr$ in the presence of peroxides is

The major product in the reaction is

Which of the following alkyl-substituted alkenes is the most stable?

What are the products obtained on hydroboration-oxidation of the given alkene?

An alkene $(A)$ $C_{16}H_{16}$ on ozonolysis gives only one product $(B)$ $C_8H_8O$. $(B)$ can also be obtained by the hydrolysis of the product obtained from the reaction between cyanobenzene and $CH_3MgBr$. $(A)$ shows geometrical isomerism and decolourises $Br_2$ water. $(B)$ on treatment with $SeO_2$ produces $(C)$. Which statement is not correct about $(A)$?