Which of the following lakes is a saltwater lake?

In which country is Lake Baikal located? Which of the following lakes is the highest navigable lake in the world? What is the name of the largest freshwater lake in Africa? Which of the Great Lakes is the smallest by surface area? Which lake is the lowest point in Africa? What is the world's largest man-made lake? What is the largest lake in Australia? Which lake is the largest in Europe?