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: One of the components of injectable formulations are preservatives. This category includes different excipients with different mechanisms of action. Which of the following is used as a chelating agent ?:
Options: <0> Butylhydroxyanisole. <1> Ethylenediaminetetraacetic acid. <2> Ascorbic acid. <3> Propyl gelate <4> Tocopherol.
[A]: pharmacology

[Q]: Question: The lithium aluminum hydride reacts with the carboxylic acids to give:
Options: <0> Esters. <1> Ketones <2> Tertiary alcohols. <3> Secondary alcohols <4> Primary alcohols.
[A]: chemistry

[Q]: Question: The ketone bodies:
Options: <0> They are used by the liver to synthesize fatty acids. <1> They only form in conditions of good nutrition. <2> Its formation is especially active in skeletal muscle. <3> It is formed from acetyl-CoA. <4> They never give acetone.
[A]:
biology