instruction:
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:
Question: What type of amino acid side chains will compete with saline ions for solvation water ?: 
 Options:  <0> Apolares. <1> Aliphatic <2> Aromatic <3> Polar <4> Without charge.
answer:
chemistry


question:
Question: Hypokalemia is a physiological symptom that can typically occur: 
 Options:  <0> In sleep disorders. <1> In addictions. <2> In anorexia nervosa. <3> In bulimia but not in anorexia nervosa. <4> In disorders of attention deficit and disturbing behavior.
answer:
psychology


question:
Question: Point out the correct statement: 
 Options:  <0> At low pO2, myoglobin is more saturated with O2 than hemoglobin. <1> CO2 increases the affinity of hemoglobin for O2. <2> 2,3 Bisphosphoglycerate is strongly bound in oxygenated hemoglobin. <3> The tissues that produce lactate release more O 2. <4> At high pO2, hemoglobin has 2 subunits.
answer:

chemistry