This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: AIIMS 2017, Subject name: Medicine
Which of the following has a male:female ratio of 1:1? 
Select and explain. 
A. Rheumatoid ahritis, B. Gout, C. Seronegative spondyloahritis, D. Polymyalgia rheumatica
C: Seronegative spondyloahritis
Answer: C: Seronegative spondyloahritis 
Explanation: Seronegative spondyloahritis has a male : female ratio of 1:1. Rheumatoid ahritis and Polymyalgia rheumatica are seen more commonly in females. Gout is more common in males.