Which of the following compounds gives diastereomers when treated with $Br_2$ in $CCl_4$?

But$-2-$ene on reaction with alkaline $KMnO_4$ at elevated temperature followed by acidification will give:

Addition of $BH_3$ followed by $H_2O_2$ to $trans-2-butene$ would give a product which is

The major product of this reaction is:

Which of the following alkenes on oxidation by $KMnO_4$ in dil. $H_2SO_4$ forms adipic acid?

$Ph-CH=CH_2 \xrightarrow[HBr]{(PhCOO)_2} \text{Product}$
Consider the above reaction:
$A$. The reaction proceeds through a more stable radical intermediate.
$B$. The role of peroxide is to generate $\dot{H}$ (Hydrogen radical).
$C$. During this reaction, benzene is formed as a byproduct.
$D$. $1-\text{Bromo}-2-\text{phenylethane}$ is formed as the minor product.
$E$. The same reaction in the absence of peroxide proceeds via a carbocation intermediate.
Identify the correct statements. Choose the correct answer from the options given below: