This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
A 27-year-old male had burning micturition and urethral discharge. After 4 weeks he developed joint pains involving both the knees and ankles, redness of the eye and skin lesion. The most probable clinical diagnosis is 
Select and explain. 
A. Psoriasis vulgaris, B. Reiter's syndrome, C. Behcet's syndrome, D. Sarcoidosis
B: Reiter's syndrome
Answer: B: Reiter's syndrome 
Explanation: Occurence of Arthritis and conjunctivitis following urinary tract infection suggests the diagnosis of Reiter's syndrome.