The decreasing order of boiling points is

n-Pentane > iso-Pentane > neo-Pentane

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iso-Pentane > n-Pentane > neo-Pentane

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neo-Pentane > iso-Pentane > n-Pentane

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n-Pentane > neo-Pentane > iso-Pentane

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Solution

The correct option is A
n-Pentane > iso-Pentane > neo-Pentane

Boiling point decreases with increase in branching.

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