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 main method for the preparation of βceto esters is the reaction known as: 
 Options:  <0> Malonic synthesis <1> Acetoacetic synthesis. <2> Condensing of Claisen. <3> Perkin reaction. <4> Hofmann reaction.

Answer: pharmacology


Question: Question: Why do ovarian cycles not appear in nursing mothers for several months after birth ?: 
 Options:  <0> For stress and lack of sleep associated with breastfeeding. <1> Because there are low levels of FSH and LH. <2> Because there are high levels of oxytocin. <3> By saving iron that is derived from breastfeeding. <4> Because there are high levels of progesterone.

Answer: pharmacology


Question: Question: A 5-year-old child presents with a purpuric rash with petechiae, ecchymosis that appeared brutally along with epistaxis and gingivorrhagia. The data of the coagulation study were: Bleeding time (Duke)> 10 min; PLT 20,000 / mm3; null clot netraction; TP 13 sec (normal: 122 sec); APTT 61 sec (normal: 602 sec); TT 18 sec (normal: 182 sec); Fibrinogen 3.2 g / l (normal: 2-4 g / l); Positive platelet autoantibodies. With these data it can be: 
 Options:  <0> Hemophilia. <1> Werlhof disease. <2> Bernard Soulier syndrome. <3> Von Willebrand disease. <4> Thrombosis of Glanzmann.

Answer:
pharmacology