Which is NOT a sign or symptom of poisoning?

Answer: D — Heat exhaustion

Heat exhaustion is not a sign or symptom of poisoning. Poisoning typically presents with a range of specific symptoms including physical reactions like burns or redness around the mouth from caustic substances, gastrointestinal symptoms such as vomiting, respiratory problems like difficulty breathing, and neurological issues including sleepiness and confusion. In contrast, heat exhaustion results from prolonged exposure to high temperatures and can manifest as heavy sweating, weakness, dizziness, or fainting, which are distinctly different from the reactions caused by toxic substances in the body. Recognizing the differences between symptoms of poisoning and other conditions like heat exhaustion is crucial for effective diagnosis and treatment.