<prompt> Which of the following is a nonmodifiable risk factor for coronary hea disease?Cigarette smokingElevated serum cholesterolAlcoholismAge  <response>: parks textbook of preventive and social medicine 23rd edition. non modifiable risk factors for CHD :age,sex,ethnicity, genetic factors. modifiable risk factors: obesity,alcohol,physical activity, saturated fat, socio-economic status. 