Q. Consider the following regions:

1. Okinawa (Japan)
2. Sardinia (Italy)
3. Nicoya Peninsula (Costa Rica)
4. Greenland
5. Loma Linda (California, USA)

Which of the above are known as "Blue Zones", areas famous for high concentrations of centenarians?
Answer: 1, 2, 3 and 5
Notes: Blue Zones are regions identified by researchers where people live significantly longer and healthier lives, often reaching 100 years or more. The Blue Zones are

1. Okinawa (Japan) - Known for high population of centenarians with diet rich in vegetables, tofu, sweet potatoes; strong social networks and physical activity
2. Sardinia (Italy) - Mountain villages have a large number of male centenarians; Mediterranean-style diet; and
3. Nicoya Peninsula (Costa Rica)- Known for longevity and low rates of chronic disease; diet includes beans, squash, corn, tropical fruits
4. Loma Linda (California, USA) – Community of Seventh-day Adventists with plant-based diet, no alcohol or tobacco; strong emphasis on faith and family

Greenland, however, is not classified as a Blue Zone due to its harsh climatic conditions and traditional Inuit diet high in fat and protein that doesn't correlate with high longevity.

This question is part of UPSC Daily 20 MCQ Series Course on GKToday Android app.