Final answer:
If a child has ingested an unknown fluid and is showing signs of mouth and lip burns, coughing, and gagging, it is best to call the medical or poison control center for advice.
Step-by-step explanation:
If a child has befuddled an unknown fluid and is showing signs of burned mouth and lips, coughing, and gagging, the best course of action is to call the medical or poison control center for advice. They are trained professionals who can provide guidance on how to proceed based on the specific situation. Administering syrup of ipecac or activated charcoal without professional advice can be dangerous and should be avoided.