Which of the following statements is true about 2-methylpropane and butane

2-methylpropane and butane are both hydrocarbons, but they differ in their structures. 2-methylpropane has a branched chain structure while butane has a straight chain structure. 1. The statement "They are members of the same homologous series" is true. They both belong to the alkane homologous series, which is characterized by hydrocarbons with only single covalent bonds. 2. The statement "They have the same boiling point" is false. Boiling points of hydrocarbons increase as the number of carbon atoms in the molecule increases. Butane has a higher boiling point than 2-methylpropane because it has more carbon atoms in its structure, and therefore has stronger intermolecular forces of attraction. 3. The statement "They have different number of carbon atoms" is true. Butane has four carbon atoms in its structure while 2-methylpropane has only three. 4. The statement "They have the same chemical properties" is false. While they both belong to the same homologous series and have similar chemical properties, their different structures affect their reactivity. For example, 2-methylpropane may undergo different reactions than butane due to the presence of a branching in its structure.