Which of the following is not a symptom of sunstroke or heatstroke?

Answer: D — Normal body temperature

Normal body temperature is not a symptom of sunstroke or heatstroke because, in these conditions, the body’s temperature typically rises significantly due to excessive heat exposure and an inability to regulate temperature effectively. This rise in body temperature can lead to serious health issues. In contrast, symptoms like headache, hot dry skin, and nausea are indicative of heat-related illnesses. A headache can occur due to dehydration or as a direct effect of overheating. Hot dry skin is a classic symptom; during heatstroke, the body's ability to sweat is impaired, preventing cooling and leading to overheating. Nausea is also common as the body reacts negatively to excessive heat and the strain it places on bodily functions.