This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diabetes Mellitus, Subject name: Medicine
HNF- 1b gene defect is seen in? 
Select and explain. 
A. MODY2, B. MODY3, C. MODY4, D. MODY5
D: MODY5
Answer: D: MODY5 
Explanation: HNF- 1b gene is involved in pathogenesis of MODY5. HNF- 1a gene is involved in pathogenesis of MODY 3. Most common type of MODY is MODY 3.