What is the product formed when $n$-propyl bromide is reacted with ethanolic potassium hydroxide?

The rate of $S_{N}1$ reaction for the given compounds is:

In the following reaction sequence,$[ C ]$ is :

Which of the following reaction sequences shows an overall inversion of configuration in the product?

Under the specified conditions,substrate $X$ undergoes substitution and elimination reactions to give products $A - D$. $A$ and $B$ are stereoisomers,but not enantiomers. $C$ and $D$ are enantiomers. $A$ is not an isomer of $C$. Which of the following could be the starting material $X$ ?
$X \xrightarrow[\Delta]{H_2O} A + B + C + D$

The product formed on the reaction of ethyl alcohol with bleaching powder is: