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.
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Question: Question: A microelectrode is characterized by:
Options: <0> Give answers in steady state. <1> Always need an inert electrolyte. <2> Always need a potentiostatic system. <3> Do not need a reference electrode. <4> Always need agitation.

Answer: chemistry

Question: Question: In an evaluation the redox indicator In (ox) + ne- In (network) is used, whose normal potential is E0. The color change will occur:
Options: <0> To the potential of the equivalence point. <1> To the value of E0. <2> In the interval E0 0.059 / n. <3> In the interval E0 (ox) - E0 (network) if it is evaluated with a reducer. <4> At the potential of 0.059 / n.

Answer: chemistry

Question: Question: A 82-year-old hypertensive woman on treatment with atenolol, hydrochlorothiazide and digoxin. He goes to the emergency room for atrial fibrillation and is administered verapamil i.v. Complete atrioventricular block is evidenced in ECG. What is the most likely cause of this clinical situation?
Options: <0> Digitalis intoxication by pharmacokinetic interaction by verapamil. <1> Hypokalemia due to the administration of thiazide and digoxin. <2> Pharmacodynamic interaction of beta-blocker, digoxin and verapamil. <3> Hypotensive effect of the thiazide diuretic. <4> Cardiac arrhythmia due to verapamil.

Answer:
medicine