Question

which symptom is a sign of alcohol poisoning? dry mouth irregular breathing slurred speech erratic behavior

Explanation:

Alcohol poisoning can depress the central nervous system, affecting vital functions like breathing. Irregular breathing is a serious sign as it indicates the body's inability to maintain normal respiratory patterns due to excessive alcohol intake. Dry mouth is a common minor effect of alcohol (dehydration - not specific to poisoning). Slurred speech and erratic behavior are signs of intoxication but not as critical and specific to poisoning as irregular breathing which is a life - threatening symptom.

Answer:

irregular breathing