Answer: A) Syncope
Step-by-step explanation:
Syncope are the most common medical emergency that is supervised by the dentists commonly seen in the united state and canada. Syncope is sudden feeling unconsciousness due to lack of supply of blood into brain. Syncope are cause by anxiety and stress that slow the rate of pulse, sweating and unconsciousness.
It can be prevented by examine the patient in supine position and by reducing the stress.