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: The aldol condensation gives rise to: 
 Options:  <0> Α, β-unsaturated amides. <1> Saturated amides. <2> Α, β-unsaturated carbonyl compounds. <3> Chiral compounds. <4> Β, γ-unsaturated carbonyl compounds.

A: chemistry
****
Q: Question: A coulometric evaluation: 
 Options:  <0> You do not need the current performance to be 100%. <1> It does not need an indicator system of the end point. <2> Always use a potentiostatic system. <3> It uses a titrant that is generated electrolytically. <4> You need a burette to add the titrant.

A: chemistry
****
Q: Question: They are secondary interoceptor mechanoreceptors: 
 Options:  <0> The corpuscle of Pacini and Ruffini. <1> The taste buds. <2> The receptors of the vestibular apparatus. <3> The hair cells of the organ of Corti. <4> The muscle bones.

A:
biology
****