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.

[Q]: Question: The thromboxanes: 
 Options:  <0> They induce platelet aggregation. <1> They inhibit platelet aggregation. <2> They act as bronchodilators in the respiratory system. <3> They are produced in the membranes of all cells. <4> They are derived from saturated fatty acids.
[A]: chemistry


[Q]: Question: A 24-year-old student who, after three weeks of a cold in the upper respiratory tract, visited the doctor for a sensation of numbness in his hands and loss of limb strength in recent days. The picture was preceded by low back pain. In the exploration, it stands out, decrease of asymmetric muscular force in upper and lower extremities, loss of osteotendinous reflexes. In this patient the most likely diagnosis is: 
 Options:  <0> Myasthenia gravis. <1> First outbreak of multiple sclerosis. <2> Acute inflammatory demyelinating polyradiculopathy. <3> Dermatomyositis <4> Amyotrophic Lateral Sclerosis.
[A]: medicine


[Q]: Question: The SO2 molecule is: 
 Options:  <0> Linear, with the S atom in the center. <1> Linear, with one of the atoms of O in the center. <2> Angular, with the S atom in the center and with an angle close to 120º (equilateral triangle) and a free pair of electrons. <3> Angular, with one of the atoms of O in the center and with an angle of approximately 120º (equilateral triangle) and a pair of free electrons. <4> Angular, with the S atom in the center and with an angle close to 109º (tetrahedron) and two pairs of free electrons.
[A]:
chemistry