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: Medicine
Which of the following is common risk factor for coronary heart disease except ? 
Select and explain. 
A. Family H/O of IHD, B. Decreased homoscystinaemia, C. HDL <40 mg/dL, D. Type 1 DM
B: Decreased homoscystinaemia
Answer: B: Decreased homoscystinaemia 
Explanation: None