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: Among the partial reactions that lead to sodium carbonate by the Solvay Process, are: 
 Options:  <0> The reaction between calcium carbonate and sodium chloride. <1> The precipitation of sodium hydrogen carbonate. <2> The thermal decomposition of ammonium chloride. <3> The formation of CaCO3 from CaO and CO2. <4> The reaction of ammonia with calcium oxide.
answer:
chemistry


question:
Question: Which of the following statements about focal nodular hyperplasia of the liver is true? 
 Options:  <0> It is considered that its appearance is related to the consumption of contraceptives. <1> The risk of breakage hemoperitoneum is similar to that of the adenoma. <2> There is a risk of tumor degeneration. <3> It behaves as a focal hypovascular lesion in computed tomography with contrast administration. <4> In the histological study of the lesion, in addition to hepatocytes, bile ducts and other liver cells can be observed.
answer:
medicine


question:
Question: In comparison with the primary humoral responses, the secondary ones: 
 Options:  <0> They are based primarily on IgM. <1> They are faster and more durable. <2> They generate antibodies of low affinity for the antigen. <3> They present a low level of hypermutation. <4> They generate much lower amount of antibodies.
answer:

biology