This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorder of Metabolism & Connective Tissue, Subject name: Medicine
All are features of Marfan's syndrome, EXCEPT: 
Select and explain. 
A. Lens dislocation, B. Aortic regurgitation, C. Mousy odor urine, D. Pneumothorax
C: Mousy odor urine
Answer: C: Mousy odor urine 
Explanation: Ans. is 'c' Mousy odour urine Mousy odour urine is a feature of homocystinuriaMarfan's syndrome:It is characterized by a triad of:Long thin extremities* frequently associated with other skeletal changes such as loose joints* and arachnodactyly *Reduced vision as a result of dislocation of lens*Aortic aneurysm*