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: To control the expression of certain genes according to population density, bacteria use systems of:
Options: <0> Strict response <1> Two components <2> Perception of the quorum. <3> Densitometric adaptation. <4> Negative activation

A: biology
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Q: Question: The hypertension developed in hyperaldosteronism is produced by:
Options: <0> Increase in blood calcium. <1> Desensitization of the vascular wall to the vasoconstrictors. <2> Greater release of adrenaline and noradrenaline. <3> Increase in the reabsorption of Na + and H2O. <4> Decrease in blood volume.

A: pharmacology
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Q: Question: Of the following scales of pain assessment in childhood, which is recommended for school children aged 7 to 8 ?:
Options: <0> NFCS scale. <1> Numerical or analog scale. <2> CHEOPS scale. <3> Scale Oucher. <4> Ladder of Wong and Baker.

A:
nursery
****