Which of the hydrocarbons are arranged as per the increasing order of their boiling points?

Boiling points of alkenes increases with their molecular masses due to stranger intermolecular forces. The order of their masses is:- Methane $ \lt $ Ethane $ \lt $ Propane $ \lt $ Butane $ \lt $ Pentane $ \lt $ Hexane $ \lt $ Heptane $ \lt $ Octane Thus, the boiling points increases in the same order. Therefore, (b) propane $ \lt $ butane $ \lt $ pentane $ \lt $ octane $ \lt $, is the correct option