1. Rheumatoid arthritis (RA) is an autoimmune disorder that primarily affects joints but can also impact other parts of the body. Which of the following statements regarding RA is/are correct?
- RA is more common in men than in women.
- The primary joints affected by RA include the small joints of the hands and feet.
- RA is caused by wear and tear of cartilage in the joints.
- The symptoms of RA can include joint stiffness, especially in the morning.
Select the correct answer using the code given below: