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: What dose should you administer orally every 12 hours of a drug whose plasma clearance is equal to 1 L / h if you want to reach an average concentration of 10mg / L equilibrium? Assume complete bioavailability (F = 1):
Options: <0> 120 mg. <1> 12 mg. <2> 200 mg. <3> 10 mg. <4> With this information it is not possible to estimate the dose necessary to reach this equilibrium concentration.
[EX A]: pharmacology

[EX Q]: Question: The reaction of 3-nitrobenzaldehyde with NaBH 4 in aqueous methanol gives:
Options: <0> 3-Aminobenzaldehyde. <1> 3-nitrobenzoic acid. <2> 1-Methyl-3-nitrobenzene. <3> 3-Nitrobenzoate sodium. <4> (3-Nitrophenyl) methanol.
[EX A]: chemistry

[EX Q]: Question: In the layer closest to the pigment epithelium of the retina are the cells:
Options: <0> Ganglionares <1> Cones and canes. <2> Amacrinas. <3> Bipolar <4> Horizontal
[EX A]:
biology