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: What kind of memory can we use to plan what we have to do to arrive on time for an appointment next Tuesday? 
 Options:  <0> Prospective report. <1> Autobiographical memory <2> Episodic memory. <3> Semantic memory <4> Procedural memory.
[EX A]: psychology

[EX Q]: Question: In a potentiometry at zero intensity the electrode: 
 Options:  <0> Indicator always measures balance potentials. <1> Indicator measures the half-wave potential. <2> Indicator can measure a mixed potential. <3> Reference is always a calomel platinum electrode. <4> Indicator is always a platinum electrode.
[EX A]: chemistry

[EX Q]: Question: What is the procedure called instrumental conditioning in which the instrumental response eliminates or prevents the occurrence of an aversive stimulus ?: 
 Options:  <0> Positive reinforcement. <1> Punishment. <2> Negative reinforcement. <3> Omission. <4> Extinction.
[EX A]:
psychology