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Which among the following has highest boiling point?

1. CH 3 CH 2 CH 2 CHO
2. CH 3 CH 2 CH 2 CH 2 – OH
3. H 5 C 2 – O – C 2 H 5
4. CH 3 CH 2 CH 2 CH 3

Correct answer: CH 3 CH 2 CH 2 CH 2 – OH

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