Step 1: Understanding heatstroke.
Heatstroke is a medical emergency caused by prolonged exposure to high temperatures, often accompanied by dehydration. Its symptoms include rapid pulse, flushed skin, and confusion.
Step 2: Evaluation of options.
- (A) Runny nose and coughing: Incorrect. These symptoms are typically associated with respiratory infections, not heatstroke.
- (B) Rapid pulse and flushed skin: Correct. These are common signs of heatstroke.
- (C) Cold extremities and shivering: Incorrect. These are more common in hypothermia, not heatstroke.
- (D) Nausea and vomiting: Incorrect. Although nausea can be a symptom, it is not the primary symptom of heatstroke.
Step 3: Conclusion.
Therefore, the signs and symptoms of heatstroke include rapid pulse and flushed skin.
Final Answer: (B) Rapid pulse and flushed skin.