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.

[Q]: Question: The use of microorganisms to transform contaminants present in the environment into non-toxic products is called: 
 Options:  <0> Biodeterioration. <1> Bioremediation. <2> Bioleaching. <3> Bioconversion <4> Biosensor
[A]: pharmacology


[Q]: Question: On the molecular biology of cancer: 
 Options:  <0> Oncogenes are mutated derivatives of normal genes, called protooncogenes, whose function is to promote cell proliferation or survival. <1> Oncogenes are genes that synthesize proteins that inhibit cell proliferation. <2> The tumor suppressor genes synthesize proteins that inhibit cell death. <3> Protooncogenes synthesize proteins that promote cell death. <4> Apoptosis is a form of activation of proto-oncogenes.
[A]: chemistry


[Q]: Question: After gastrulation, the epiblast is transformed into: 
 Options:  <0> Endoderm <1> Mesoderm <2> Ectoderm <3> Celoma <4> Chorionic villi.
[A]:
biology