This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pathology
[{'content': 'Which of the following is non-modifiable risk factor for CHD \nSelect and explain. \nA. Diabetes, B. Smoking, C. Hypeension, D. old age', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Nonmodifiable (Constitutional) Genetic abnormalities,Family history,Increasing age.Male gender Modifiable Hyperlipidemia Hypeension Cigarette smoking Diabetes Inflammation (Robbins Basic Pathology,9th edition,pg no.336)', 'role': 'assistant'}]