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: Mitochondrial oxidative phosphorylation is regulated by: 
 Options:  <0> Mitochondrial steroid hormones. <1> Apoptosis <2> Thermogenin <3> The cytochrome c. <4> The cellular energy charge.

A: chemistry
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Q: Question: The following patients are sent to the hypertension clinic. Indicate which one you would NOT suspect secondary hypertension. 
 Options:  <0> 25 year old woman with an abdominal puff. <1> Hypertension with hypokalemia in a 50-year-old man who does not take drugs. <2> A 55-year-old woman with a body mass index of 28 and dyslipidemia. <3> A 78-year-old woman who has not been controlled with 3 drugs for 3 months. <4> Man of 60 years with daytime sleepiness, morning headache and snoring.

A: medicine
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Q: Question: DO NOT generate action potentials: 
 Options:  <0> Smooth muscle fibers. <1> Bipolar neurons of the retina. <2> Skeletal striated muscle fibers. <3> Cardiac muscle fibers. <4> Ganglion neurons of the retina.

A:
biology
****