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.

Let me give you an example: Question: A distension is defined as:
Options: <0> Soft tissue injury. <1> Forced movement of abrupt production. <2> Injury by stretching a muscle. <3> Injury of the joint capsule. <4> Interruption in the continuity of a bone.
The answer to this example can be: nursery
Here is why: Distension means Bloating and swelling in the belly area. It does not have much to do with chemistry, psychology, pharmacology, biology and medicine. Hence, the correct topic is nursery.

OK. solve this:
Question: In a patient connected to invasive mechanical ventilation, when all movements are generated by the ventilator, supplying a certain volume with a constant flow during a preset time, without allowing the synchronization with spontaneous or additional respirations of the patient, we refer to:
Options: <0> Assisted ventilation <1> Controlled mechanical ventilation. <2> Synchronized intermittent mandatory ventilation. <3> Spontaneous ventilation with continuous positive pressure. <4> Positive pressure at the end of expiration.
Answer:
nursery