Molecular formula `C_(3)H_(6)O` having following structures.
(1) `CH_(2)=CH-CH_(2)-OH`
(2) `CH_(2)=underset(OH)underset(|)C-CH_(3)`
(3) `underset(OH)underset(|)CH=CH-CH_(3)`
(4) `CH_(3)-CH_(2)-underset(O)underset(||)C-H`
(5) `CH_(3)-underset(O)underset(||)C-CH_(3)`
(6) `CH_(2)=CH-OCH_(3)`
Find out the incorrect statement.
A. (3) and (4) are tautomers
B. (4) and (6) are functional isomers
C. (1) and (7) are ring chain isomers
D. (2) and (6) are chain isomers