Which of the following reaction is correct?

The Markovnikov Rule predicts the regiochemistry of $\mathrm{HX}$ addition to unsymmetrically substituted alkenes. The halide component of $\mathrm{HX}$ bonds preferentially at the more highly substituted carbon, whereas hydrogen prefers the carbon which already contains more hydrogen.

By the reaction with${\mathrm{HNO}}_2$ amine doesnot lose any carbon while producing alcohol.

${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{NH}}_2\stackrel{{\mathrm{HNO}}_2/0-5^{\mathrm{o}}\mathrm{C}}{\to }{\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{OH}+{\mathrm{N}}_2+\mathrm{HCl}$

Cyclohexene undergo allylic substitution reaction with bromine in the presence of sunlight.

In Hoffmann bromamide degradation amides give amines by loss of one carbon.

${\mathrm{C}}_2{\mathrm{H}}_5{\mathrm{CONH}}_2+{\mathrm{Br}}_2+\mathrm{NaOH}\stackrel{}{\to }{\mathrm{C}}_2{\mathrm{H}}_5{\mathrm{NH}}_2+{\mathrm{Na}}_2{\mathrm{CO}}_3+\mathrm{NaBr}+{\mathrm{H}}_2\mathrm{O}$