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.
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Question: Question: The papillary muscles: 
 Options:  <0> They contract atrio-ventricular valves. <1> They prevent the reflux of blood to the atria. <2> They avoid the eversion of the semilunar valves. <3> They form the interventricular septum. <4> They are formed by visceral smooth muscle.

Answer: biology


Question: Question: The Grignard reagents attack the epoxides to give, after the appropriate hydrolysis: 
 Options:  <0> Carboxylic acids. <1> Cyclic amides. <2> Open aliphatic chains. <3> Open-chain alcohols. <4> Cyclic ethers.

Answer: pharmacology


Question: Question: To deal directly and effectively with stressful situations, you can use: 
 Options:  <0> Confrontation as a strategy centered on emotion. <1> The distancing as a strategy focused on the problem. <2> Strategies focused on the problem, such as social support. <3> The defensive mechanism of regression. <4> The self-incrimination.

Answer:
nursery