The correct name of $$$2 -$chlorobutan $-3-$ol is :-

The correct name for  is

The correct $\mathrm{IUPAC}$ name of the above compound is:

The decreasing order of acid strength by the following sequence of reaction is

Correct arrangement of the following acids in correct ${\mathrm{K}}_{\mathrm{a}}$ order is

(I) ${\mathrm{H}}_3{\mathrm{N}}^{\oplus }-{\mathrm{CH}}_2-\mathrm{COOH}$

(II) $\mathrm{NC}-{\mathrm{CH}}_2-\mathrm{COOH}$

(II) ${\mathrm{H}}_3\mathrm{C}-{\mathrm{CH}}_2-\mathrm{COOH}$

(IV) $\stackrel{⊝}{\mathrm{O}}\mathrm{OC}-{\mathrm{CH}}_2-\mathrm{COOH}$