Which of the following symptoms would most likely indicate synovitis?

Synovitis refers to the inflammation of the synovial membrane, which lines the joints. This condition typically presents with specific symptoms related to joint functionality and health. The presence of stiffness and swelling around the joints is a classic sign of synovitis, as inflammation causes the synovial membrane to produce excess synovial fluid, leading to swelling and a feeling of tightness or stiffness in the affected joint. This is usually accompanied by pain and possibly redness as well.

In contrast, cramping in the lower limbs is often related to muscular issues or circulatory problems rather than to synovial membrane inflammation. Acute pain after a fall could be indicative of various traumatic injuries or conditions but is not specifically reflective of synovitis, which is a more chronic inflammatory condition. Sudden loss of range of motion might occur in synovitis, but it is also associated with other joint problems or injuries. However, the combination of stiffness and swelling distinctly points towards synovitis as it directly reflects the inflammatory process affecting the joint's synovial lining.