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: Social & Preventive Medicine
The commonest cause of death in the sophisticated world - 
Select and explain. 
A. Ischemic heart disease, B. Accidents, C. Infectious disease, D. None of the above
A: Ischemic heart disease
Answer: A: Ischemic heart disease 
Explanation: Coronary heart disease (Ischemic heart disease) 

CHD is defined as "impairment of heart function due to inadequate blood flow to the heart compared to its needs, caused by obstructive changes in the coronary circulation to the heart".
It is the most common cause of death in developed countries and account for 25-30% of deaths.
CHD is modern epidemic, i.e. a disease that affects populations, not an unavoidable attribute of ageing.