Which of the following pairs of compounds are positional isomers ?

1.	Which of the following pairs of compounds are positional isomers ?
Answer» `CH_(3)-CH_(2)-CH_(2)-CHO and CH_(3)-CH_(2)-CH_(2)-OVERSET(O)overset(\|\|)C-CH_(3)` `CH_(3)-CH_(2)-CH_(2)-underset(O)underset(\|\|)C-CH_(3) and CH_(3)-underset(CH_(3))underset("\|")"CH"-CH_(2)-CHO` `CH_(3)-CH_(2)-CH_(2)-underset(O)underset(\|\|)C-CH_(3) and CH_(3)-CH_(2)-underset(O)underset(\|\|)C-CH_(2)-CH_(3)` `C_(6)H_(5)-CH_(2)-underset(O)underset(\|\|)C-CH_(2)-CH_(2)-CH_(3)` and Solution :(A) Not isomers (B) Functional isomers (C) Positional isomers (D) Not isomers

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