To solve this problem, we need to identify the method suitable for obtaining highly pure metal that is liquid at room temperature.$\newline$Let's analyze each option:$\newline$• Option 1: Electrolysis is a method used for purifying metals, but it is not typically used for metals that are liquid at room temperature.$\newline$• Option 2: Chromatography is a technique used for separating mixtures, not for purifying metals.$\newline$• Option 3: Distillation is a suitable method for purifying metals that are liquid at room temperature.$\newline$ This is because distillation involves heating the liquid metal to vaporize it and then condensing the vapor back into a liquid,$\newline$ effectively separating it from impurities. Mercury (Hg) is an example of a metal that is liquid at room temperature and can be purified by distillation.$\newline$• Option 4: Zone refining is used for purifying semiconductors and solid metals, not for metals that are liquid at room temperature.$\newline$Therefore, the correct method for obtaining highly pure metal that is liquid at room temperature is distillation.$\newline$This corresponds to Option 3.