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: The set of means and systems that facilitate the contact of the infectious agent with the recipient subject corresponds to: 
 Options:  <0> Source of infection. <1> Habitat. <2> Transmission mechanism. <3> Biotope <4> Reservoir.
[EX A]: nursery

[EX Q]: Question: The blood flow velocity is maximum in: 
 Options:  <0> Great arteries <1> Distribution arteries. <2> Arterioles <3> Capillaries <4> Venules
[EX A]: biology

[EX Q]: Question: Young person who goes to the emergency room for second degree flame burn of 10% of the body surface, affecting the right arm in an extensive and circular way. There is no arterial pulse in the hand measured by Doppler. What is the treatment of choice? 
 Options:  <0> Cures with occlusive silver sulfadiacin and evaluation of depth per week. <1> Lymphatic drainage and assess a vascular by-pass. <2> Escarotomy or emergency decompression incisions. <3> Expectant behavior <4> Amputation of the extremity.
[EX A]:
medicine