`CH_(2)CH_(2)CH_(2)-Cl` and `CH_(3)-underset(CH)underset(|)(CH)-CH_(3)` shows which type isomerism

CH_(3)CH_(2)CH_(2)-OH and CH_(3)-underset(OH)underset(|)(CH)-CH_(3) shows which type of isomerism

CH_(3)-underset(OH)underset(|)(CH)-CH_(2)Cl

CH_(3)-CH_(2)-CH_(2)-CH_(3) and CH_(3)-underset(CH_(3))underset(|)(CH)-CH_(3) shows which type of isomerism

CH_(3)CH_(2)CH_(2)NH_(2),CH_(3)CH_(2)NHCH_(3) and CH_(3)-underset(CH_(3))underset(|)(N)-CH_(3) express which of isomerism

I. CH_(3) - CH_(2) - CH_(2) - CH_(2) - OH II. CH_(3) - CH_(2) - underset(OH)underset(|)(CH) - CH_(3) III. CH_(3) - underset(OH) underset(|)overset(CH_(3))overset(|)(C) - CH_(3) IV. CH_(3) - underset(CH_(3))underset(|)(CH) - CH_(2) - OH V. CH_(3) - CH_(2) - O - CH_(2) - CH_(3) VI. CH_(3) - O - CH_(2) - CH_(2) - CH_(3) VII. CH_(3) - O - underset(CH_(3))underset(|)(CH) - CH_(3) Which of the above compounds form pairs of metamers ?

I. CH_(3) - CH_(2) - CH_(2) - CH_(2) - OH II. CH_(3) - CH_(2) - underset(OH)underset(|)(CH) - CH_(3) III. CH_(3) - underset(OH) underset(|)overset(CH_(3))overset(|)(C) - CH_(3) IV. CH_(3) - underset(CH_(3))underset(|)(CH) - CH_(2) - OH V. CH_(3) - CH_(2) - O - CH_(2) - CH_(3) VI. CH_(3) - O - CH_(2) - CH_(2) - CH_(3) VII. CH_(3) - O - underset(CH_(3))underset(|)(CH) - CH_(3) Which of the above compounds form pairs of metamers ?

Isomerism shown by {:(CH_(3)-(CH_(2))_(3)-O-CH_(3)),(CH_(3)-CH_(2)-O-CH_(2)-CH_(2)-CH_(3)),(CH_(3)-underset(CH_(3))underset(|)CH-O-CH_(2)-CH_(3)):} is