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: Pediatrics
You are examining a patient and finds that the joints have hypermobility and hyperextensibility. Which of the following is NOT associated with joint hyperextensibility? 
Select and explain. 
A. Stickler Syndrome, B. Hyperlysinemia, C. Fragile X syndrome, D. Hurler's syndrome
D: Hurler's syndrome
Answer: D: Hurler's syndrome 
Explanation: Some conditions associated with hyperextensibility of joints are: Marfans syndrome Ehler's - Danlos syndrome Stickler syndrome Homocystinuria Primary hyperparathyroidism Note: Hyper extensibility of fingers and hands may be seen in Cailage hair hypoplasia, Cutis laya and fragile X syndrome. Hurler's syndrome is associated with stiffness of joints. Ref: Meharban Singh, Edition 3, Page - 137.