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: Pathology
Which one of the following disorders is autosomal recessive ? 
Select and explain. 
A. Homocystinuria, B. G6PD deficiency, C. Myotonic dystrophy, D. Otospongiosis
A: Homocystinuria
Answer: A: Homocystinuria 
Explanation: None