Which of the following would not rearrange to a more stable form?

Product $(B)$ is

If the following compound is treated with $Pd/C$ in excess of hydrogen gas,how many stereoisomers of the product will be obtained?

Identify the product $(C)$ in the following reaction sequence:
$CH_3-CH(Cl)-CH(Cl)-COO^-$ $\xrightarrow{-CO_2} A$ $\xrightarrow{HCl} B$ $\xrightarrow{aq. KOH} C$

Action of hydrogen chloride on $CH_3-C(CH_3)=CH_2$ and on $CH \equiv CH$ will predominantly give the compounds,respectively

In laboratory burners,we use