How many compounds from following compounds can react with ${\mathrm{NaNH}}_2$ to evolve ${\mathrm{NH}}_3.$



$\mathrm{CH}\equiv \mathrm{CH}, {\mathrm{H}}_2\mathrm{C}={\mathrm{CH}}_2, \mathrm{ }{\mathrm{CH}}_4 \mathrm{ }, \mathrm{ }{\mathrm{H}}_2\mathrm{O}, {\mathrm{CH}}_3-\mathrm{OH}$

What is the IUPAC nomenclature of the given compound ?

The stability order of the given alkenes is

What is the IUPAC name for the following compound?

The structure of $3$-methylpent-$2$-ene is