Which grade indicates extremely painful with inevitable loss of function and swelling?

• A. Grade II sprain/strain
• B. Grade I sprain/strain
• C. No injury
• D. Grade III sprain/strain

Answer: (D)

The situation described—extreme pain with loss of function and swelling—fits the most severe level of tissue injury. This grade represents a complete tear of the ligament or tendon, which disrupts the structure enough to produce marked swelling and a near-maximum loss of function. In contrast, a mild grade involves only a stretch with little pain or swelling and full function, while a moderate grade involves a partial tear with more pain and swelling but not a complete loss of function. So the description aligns with the most severe grade.