Answer :
Final answer:
The proximal (PA) hub refers to the hub that is closest to the user, often containing connections for balloon inflation or thermistor data collection.
Explanation:
The proximal (PA) hub refers to the hub closest to the user and typically is where connections such as balloon inflation or data collection, like thermistor, might be made. Judging by the options provided, the hub closest to the tip would be the distal hub, not the proximal hub. The proximal hub is typically closer to the operator, and could contain technology such as thermistor connection.
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