Give the IUPAC name of
(i) `CH_(3)CH(OH)CH_(2)OH`
(ii) `HO -CH_(2)-CH_(2)-OH`
(iii) `CH_(3)-overset(OH)overset(|)CH-COOH`

Explanation

(i)Propane -1,2-diol
(ii) Ethane -12-diol
(iii) 2-Hydroxy propanoic acid