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.

Question: A spontaneous process is characterized because: 
 Options:  <0> In isolated systems the entropy decreases (ΔS <0). <1> At constant pressure and temperature, the Gibbs energy decreases (ΔG <0). <2> At constant pressure and temperature, the Helmholtz energy decreases (ΔA <0). <3> At constant volume and temperature, the Gibbs energy increases (ΔG> 0). <4> It is reversible.
pharmacology

Question: The initial procedure of choice to investigate a possible obstruction of the biliary tract is: 
 Options:  <0> Hepatobiliary ultrasound. <1> Endoscopic retrograde cholangiopancreatography (ERCP). <2> Colangio Magnetic Resonance. <3> Computed tomography. Abdominal CT <4> Percutaneous transhepatic cholangiography.
medicine

Question: Question linked to image nº15 A 67-year-old patient who reported a decrease in unilateral visual acuity and rapidly evolving metamorphopsia. The attached retinography presents the image of the affected eye. The most likely diagnosis would be: 
 Options:  <0> Macular degeneration associated with exudative age. <1> Retinal detachment. <2> Retinitis pigmentosa <3> Central vein thrombosis of the ischemic retina. <4> Equatorial choroidal melanoma.

medicine