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
The HLA important in IDDM is -. 
Select and explain. 
A. HLA-A3, B. HLA-B27, C. HLA-DR3/DR4, D. HLA-W1
C: HLA-DR3/DR4
Answer: C: HLA-DR3/DR4 
Explanation: 95% of IDDM (Type I Diabetes Mellitus) patients express either HLA DR3 or HLA DR4 or the heterozygous DR3 / DR4 configuration. 
No HLA association is seen with Type II Diabetes mellitus or NIDDM.