Final answer:
Laryngospasm is most likely to occur in a drowning situation when a small amount of water enters the trachea, causing a muscular spasm in the larynx that seals the airway.
Step-by-step explanation:
Laryngospasm is most likely to occur in a drowning situation. When a small amount of water enters the trachea, it causes the larynx to go into a muscular spasm, sealing the airway and preventing water from entering the lungs. This spasm usually lasts until unconsciousness occurs.