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
Diagnostic criteria of Metabolic syndrome includea) High serum homocysteineb) High serum triglyceridec) Low HDL cholesterold) High LDL cholesterol 
Select and explain. 
A. c, B. d, C. bd, D. ac
C: bd
Answer: C: bd 
Explanation: None