Which one of the following is not an epidemic diseases?

Hypertension

The correct answer is option 1: Hypertension

Epidemic diseases are those that spread rapidly and affect many people at the same time in a particular area. The major epidemic diseases in the past were fevers of various sorts, plague, smallpox and cholera. But the single biggest epidemic was the influenza epidemic of 1918-19, which killed as many as 170 lakh people, or about 5% of the total population of India at that time. (Estimates of deaths vary, and some are much higher. Also known as ‘Spanish Flu’, the influenza pandemic was a global phenomenon.

Hypertension, on the other hand, is a chronic non-communicable disease (NCD), not an epidemic. It develops over time and does not spread from person to person, which makes it not an epidemic disease.