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: They are involved in the lytic action of cytotoxic T lymphocytes:
Options: <0> Granzimas <1> Opsonins. <2> Histamines <3> Integrins <4> Cathepsins.

A: biology
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Q: Question: A rat pathogen that has fleas as vectors of transmission to humans is:
Options: <0> Rickettsia rickettsii. <1> Yersinia pestis <2> Borrelia burgdorferi. <3> Ehrlichia ewingii. <4> Brucella abortus.

A: biology
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Q: Question: According to the Arrhenius equation, k =
Options: <0> The kinetic constant (k) decreases with increasing temperature. <1> The pre-exponential factor (A) is dimensionless. <2> In reactions with higher activation energy (Ea), the kinetic constant (k) depends enormously on the temperature. <3> The pre-exponential factor (A) and the kinetic constant (k) are inversely proportional. <4> The Arrhenius parameters are the kinetic constant (k) and the preexponential factor (A).

A:
pharmacology
****