Given the task definition and input, reply with output. In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.

Question: The ethanol-water mixture has an azeotrope, this means that:
Options: <0> From a certain concentration, the two liquids are immiscible. <1> The mixture has a minimum co-solution temperature. <2> Both components comply with Raoult's law. <3> The mixture is frozen at a single temperature. <4> Once the azeotropic composition is reached, the two liquids can not be separated by distillation.
pharmacology