This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pelvis and Hip Injury, Subject name: Orthopaedics
True statement regarding Mseleni joint disease is: 
Select and explain. 
A. Shoulder, elbow wrist involvement is characteristic, B. Elderly males are commonly involved, C. Height is unaffected, D. Endemic to nohern Kwazulu Natal area in South Africa
D: Endemic to nohern Kwazulu Natal area in South Africa
Answer: D: Endemic to nohern Kwazulu Natal area in South Africa 
Explanation: * Mseleni joint disease is an endemic form of osteoahritis that affects Tsonga people in nohern Kwazulu Natal area in South Africa.* The most commonly involved joint is hip joint. * It occurs more commonly in females and younger population.