Some statements about isomerism are given
(I) n - propyl amine and isopropyl amine are position isomers
(II)n - butyl amine, isobutyl amine are chain isomers
(III)n - propyl amine and tri methyl amine are functional isomers
(IV)di ethyl amine and n - propyl methyl amine are metamers The correct statements are
All
10 , 20, 30 amines are functional isomers