Nice quiz in general, though I would like to point out that the country with the lowest elevation should be Israel/Jordan due to the Dead Sea that lies between them. The Dead Sea's elevation is 430.5m below sea level, which is significantly lower than Maldives' lowest point of 0m. It is famed to be the lowest point on Earth. However, if you're talking about the country with the lowest average elevation, Maldives would be the correct answer, with 1.5m. Hope my comment would enhance the accuracy of the quiz!