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: 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.

Answer: medicine


Question: Question: The molar absorption coefficient of a compound: 
 Options:  <0> It has dimensions of M-1 cm-1, it is constant at a specific wavelength and in a particular solvent. <1> Its dimensions are mol L-1 cm-2 and it is constant at a given wavelength and in a given solvent. <2> It has dimensions L mol-1 cm-3 and is constant throughout the spectral region and is not influenced by the solvent. <3> Its dimensions are Photons per mole and it varies with the wavelength and with the solvent. <4> It is dimensionless, constant and does not vary with the wavelength or with the solvent.

Answer: chemistry


Question: Question: All the following diseases can be accompanied by palpable splenomegaly, EXCEPT one. Indicate the latter: 
 Options:  <0> Non-Hodgkin lymphoma. <1> Multiple myeloma. <2> Tricholeukemia. <3> Gaucher disease. <4> Myelofibrosis with myeloid metaplasia.

Answer:
medicine