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: In which of the following positions should a patient be placed to perform a gastroscopy? 
 Options:  <0> Right lateral decubitus. <1> Left lateral decubitus. <2> Supine decubitus <3> Trendelemburg. <4> Sims position.
nursery

Question: The lithium aluminum hydride reacts with the carboxylic acids to give: 
 Options:  <0> Esters. <1> Ketones <2> Tertiary alcohols. <3> Secondary alcohols <4> Primary alcohols.
chemistry

Question: Which of the following in an oncogene whose transcription product is a membrane receptor with tyrosine kinase activity of a growth factor? 
 Options:  <0> HER2 / neu. <1> p53. <2> myc <3> APC. <4> Ras.

medicine