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: 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.
Example Output: chemistry

Example Input: Question: A potential receiver: 
 Options:  <0> It is produced by the opening of voltage-dependent channels. <1> Increase its frequency if the intensity of the stimulus increases. <2> It occurs after the binding of the neurotransmitter to the postsynaptic receptor. <3> They occur if the trigger threshold is exceeded. <4> It can be exciter or inhibitor.
Example Output: biology

Example Input: Question: The 2-microglobulin: 
 Options:  <0> It is a low molecular weight immunoglobulin. <1> It is found in high concentration in platelets. <2> It filters freely through the glomerulus and is secreted by the tubule. <3> It is absent in urine. <4> It is found on the surface of all nucleated cells.
Example Output:
pharmacology