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: In relation to the physiology of the complement system, one of the following statements is false: 
 Options:  <0> Most of its components are inactive. <1> Its mode of activation is similar to the coagulation cascade. <2> It is subject to strict control of regulatory mechanisms. <3> It is only activated by two different routes: the classical and the alternative. <4> During its activation, multimolecular complexes are formed.
[EX A]: pharmacology

[EX 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.
[EX A]: chemistry

[EX Q]: Question: The loss of linearity of the calibration line when the fluorescence intensity is used as an analytical parameter may be due to: 
 Options:  <0> Changes in solvent density as the concentration of fluorescent analyte increases. <1> Dissolved oxygen, due to its diamagnetic character, which favors intersystem crossing. <2> The presence of static inhibitors of the incident radiation. <3> Internal conversion, in which the energy absorbed can be transformed into heat energy. <4> Self-absorption, to the internal effect of bucket and to the formation of dimers and excimers.
[EX A]:
chemistry