This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lens, Subject name: Ophthalmology
In homocystinuria, lens subluxates in 
Select and explain. 
A. Inferolateral, B. Inferonasal, C. Superionasal, D. Superiotemporal
B: Inferonasal
Answer: B: Inferonasal 
Explanation: Homocystinuria. It is an autosomal recessive, inborn error of metabolism. In it the lens is usually subluxated inferior and nasally. Systemic features Fair complexion, malar flush, mental retardation, fits and poor motor control Diagnosis is established by detecting homocysteine in urine by sodium nitro-prusside test. Ref;A.K.Khurana; 6th edition; Page no:216 QUESTION REPEATED