Final answer:
Rheumatoid Arthritis (RA) and Systemic Lupus Erythematosus (SLE) share several symptoms such as joint stiffness and pain, skin rash, and Raynaud's phenomenon. These reflect the systemic involvement in autoimmune diseases.
Step-by-step explanation:
Shared Symptoms of Rheumatoid Arthritis (RA) and Systemic Lupus Erythematosus (SLE)
The autoimmune diseases Rheumatoid Arthritis (RA) and Systemic Lupus Erythematosus (SLE) share several symptoms due to their systemic nature. Some of the shared symptoms include:
Based on the provided information and established medical knowledge, options 3 (Joint stiffness and pain) and 4 (Raynaud's phenomenon and skin rash) present symptoms shared by RA and SLE.