Which of the organisms most commonly causes reactive ahritis?
Answer is D (Chlamydia): Amongst the options provided Chlamydia is the most commonly implicated agent in Reactive ahritis. `Chlamydia Trachomatis is by far the most common cause of urethritis and of reactive ahritis following urethritis.
Ureaplasma urealyticum
Group A beta hemolytic streptococci
Borrelia burggorferi
Chlamydia