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: Given three DNA molecules of the same length (A, B and C) and in the same solvent, but with different richness in terms of G + C content (A: 50%, B: 60%, and C: 75% ), How would your melting temperatures (Tm) be ?: 
 Options:  <0> A> B> C. <1> Being in the same solvent, they would be the same in all three cases. <2> The DNA molecule C would not belong to a thermophilic bacterium, given its lower Tm. <3> C> B> A. <4> You can not know with the information of the statement.
answer:
pharmacology


question:
Question: A motor neuron and all the muscle fibers that it innervates constitute: 
 Options:  <0> Motor plate. <1> Motor unit <2> Neuromuscular junction <3> Motor synapse <4> Motor filament
answer:
biology


question:
Question: It is the etiological agent of cutaneous myiasis: 
 Options:  <0> Glossina palpalis. <1> Dermatobia hominis. <2> Simulimum damnosum. <3> Pulex irritans. <4> Tunga penetrans.
answer:

pharmacology