<prompt> Which of the following is a non-modifiable risk factor for CHD -DiabetesSmokingHypertensionOld age  <response>: Ans. is 6d i.e., Old age o Old age is a non-modiflable risk factor for atherosclerosis and coronary heart disease CHD.o Other three given in question are modifiable risk factors.Risk factors for atherosclerosis and coronary heart diseaseModifiableo Hyperlipidemiao Diabeteso Trans-unsaturated fat intakeo Hypertensiono Alcoholo Chlamydia pneumonaeo Cigarette smokingo Lipoprotein ao CMVo Physical inactivity Nonmodifiableo Old ageo Obesityo Stress type A personalityo Male gendero Postmenopausalo Homocysteineo Family historyo Prothrombotic factors 