Which statement about rheumatoid arthritis (RA) is NOT TRUE?

Correct answer: C. RA can be triggered by Epstein-Barr virus/mononucleosis

• A. Group A Streptococcal infection has been associated with triggering autoimmune conditions — this has some support in literature for RA.
• B. RA is indeed an autoimmune condition — this is TRUE.
• C. Correct — this is the NOT TRUE statement. EBV/mononucleosis has been proposed as a potential trigger for some autoimmune conditions, but the DIRECT causal link between mononucleosis and RA is not established as a proven trigger in the same way as other RA risk factors (genetic, Strep infection, other triggers). The source specifically flagged this as 'not sure if true' — the board answer is that EBV/mono is NOT a recognized established RA trigger.
• D. TMJ involvement causing limited opening is a recognized feature of RA — TRUE.

Note: This question is flagged as clinically nuanced. The study group should verify: while EBV is discussed in autoimmunity research, it is not a classically established RA trigger on INBDE. Streptococcal throat infection IS associated with some autoimmune conditions.