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.

[EX Q]: Question: Vasconstricts systemic arterioles: 
 Options:  <0> Low pO2. <1> Low pH. <2> Angiotensin II. <3> Acetylcholine <4> Nitric oxide.
[EX A]: biology

[EX Q]: Question: When assessing the position held by the baby suckling, which of the following signs indicate that the position and grip of the baby is NOT correct? 
 Options:  <0> The chin touches the chest. <1> The mouth is very open. <2> Everted lips <3> Nose very close to the chest. <4> More areola visible above the mouth.
[EX A]: nursery

[EX Q]: Question: How does the increase in temperature affect the reaction between antigen and antibody? 
 Options:  <0> Increases the reaction rate and decreases binding affinity. <1> It decreases the reaction rate and increases the binding affinity. <2> Increases the reaction rate and binding affinity. <3> Decreases the reaction rate and binding affinity. <4> None of the above options is correct.
[EX A]:
chemistry