Which of the following could cause an obstruction of airway?a. Vomitb. Swelling of throatc. Tongued. All of above

d. All of above

Each of the options listed can potentially cause an obstruction of the airway:

a. Vomit: If a person vomits and is not in a position to clear their airway (for example, if they are unconscious), the vomit can block the airway and prevent breathing.

b. Swelling of the throat: This can occur due to an allergic reaction, infection, or injury. The swelling can narrow or completely block the airway.

c. Tongue: In certain situations, such as during unconsciousness or a seizure, the tongue can fall back into the throat and block the airway.

So, all of the above (vomit, swelling of the throat, and the tongue) can cause an obstruction of the airway.