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: Point out the correct statement: 
 Options:  <0> At low pO2, myoglobin is more saturated with O2 than hemoglobin. <1> CO2 increases the affinity of hemoglobin for O2. <2> 2,3 Bisphosphoglycerate is strongly bound in oxygenated hemoglobin. <3> The tissues that produce lactate release more O 2. <4> At high pO2, hemoglobin has 2 subunits.

A: chemistry
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Q: Question: At what stage is the person when they begin to balance the positive and negative consequences of drug use and, as a result, begin to consider stopping consumption, but basically maintain their ambivalence in this decisional balance? 
 Options:  <0> Stadium of action. <1> Contemplation stadium. <2> Relapse stadium. <3> Pre-contemplation stadium. <4> Post-relapse stadium.

A: psychology
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Q: Question: Motor plate is the union between the motor neuron and the: 
 Options:  <0> Smooth muscle. <1> Skeletal muscle <2> Cardiac muscle <3> Muscle spindle <4> Tendon.

A:
biology
****