Step 1: Concept:
This question tests foundational general pathology, specifically asking for the classic cardinal signs of acute localized inflammation originally described by the Roman encyclopedist Celsus.
Step 2: Step-by-step Explanation:
• When tissue suffers an injury or infection, the body mounts an acute inflammatory response characterized by local vascular dilation and increased capillary permeability.
• This process manifests in four classic, universally recognized physical signs (often taught in their Latin forms):
1. Rubor (Redness - A): Caused by massive vasodilation and increased blood flow to the damaged area.
2. Tumor (Swelling - B): Caused by the leakage of protein-rich plasma fluid (exudate) into the surrounding interstitial tissues.
3. Calor (Heat): Also caused by the heavy influx of warm, core-body blood to the surface area. Therefore, Cold (C) is completely false. An inflamed area is remarkably warm to the touch.
4. Dolor (Pain - D): Caused by physical swelling pressing on nerve endings, coupled with the release of chemical pain mediators like bradykinin and prostaglandins.
• (A fifth sign, Functio laesa or Loss of Function, was later added by Rudolf Virchow).
• Based on the true signs, A, B, and D are correct.
Step 3: Final Answer:
The correct combination is A, B, and D Only.