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.

Example Input: Question: Which glands are located between the skin and the masseter muscle, in front and under the outer ear? 
 Options:  <0> Parotid glands <1> Submandibular glands <2> Sublingual glands <3> Mouth glands <4> Lieberkühn's glands.
Example Output: pharmacology

Example Input: Question: A 56-year-old woman presents, after a casual fall to the floor, pain, deformity and increased volume in the left arm, with impossibility for the dorsal flexion of the hand. What is the most likely diagnosis? 
 Options:  <0> Trocheter fracture in the left humerus. <1> Diaphyseal fracture of the left humerus with radial nerve injury. <2> Supraconcondylar fracture of the humeral palate with median nerve injury. <3> Fracture of the anatomical neck of the humerus with radial nerve injury. <4> Fracture of displaced epitrochlea with ulnar nerve injury.
Example Output: medicine

Example Input: Question: CO is toxic to aerobic organisms: 
 Options:  <0> Because it oxidizes the OH groups of the hemoglobin, preventing it from being able to fix O2 correctly. <1> Because it enters the mitochondria, picking up electrons from the transport chain with less efficiency than O2. <2> Because it joins the heme group with greater affinity than O2. <3> Because having a greater dipolar character, is more soluble than O2 in blood and blocks the exchange of O2 between air and blood at the level of the lungs. <4> None of the above is correct.
Example Output:
chemistry