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: Biochemistry
hn RNA seen in 
Select and explain. 
A. Spinal muscular dystrophy, B. Sickle cell disease, C. Hutchinson chorea, D. α-Thallasemia
A: Spinal muscular dystrophy
Answer: A: Spinal muscular dystrophy 
Explanation: β-thalassemia & spinal muscular atrophy occur due to defective splicing of hnRNA.