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 p-nitrobenzoic acid is: 
 Options:  <0> Less acid than benzoic acid. <1> Less acid than p-methoxybenzoic acid. <2> More acid than benzoic acid and with lower pKa. <3> More acid than benzoic acid and with higher pKa. <4> Less acid than p-methoxybenzoic acid and with lower pKa.
[A]: pharmacology


[Q]: Question: Which of the following statements about aging corresponds to the psychosocial approach known as Theory of Continuity? 
 Options:  <0> Well-being in old age depends on newly acquired roles. <1> Aging successfully is related to the number of activities that are carried out. <2> As you get older it is necessary to voluntarily abandon certain activities. <3> Aging in a healthy way implies not dissociating from social roles. <4> The level of activity in old age is a function of the person's life trajectory.
[A]: nursery


[Q]: Question: The proteins can exhibit a fluorescent emission spectrum due to the presence of the following intrinsic fluorophores that absorb radiation in the UV-next region: 
 Options:  <0> Alanine, valine, glycine. <1> Tryptophan, tyrosine, phenylalanine. <2> Serine, methionine, asparagine. <3> Cysteine, alanine, methionine. <4> None of the above is correct, proteins never exhibit fluorescence.
[A]:
chemistry