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: What weight class corresponds to a Body Mass Index of 26 and what degree of risk does it entail for health ?:
Options: <0> Normal weight and zero risk. <1> Overweight grade I and zero risk. <2> Obesity grade I and moderate risk. <3> Obesity grade II and high risk. <4> Morbid obesity and very high risk.
psychology