The correct answer is (a) Baikal.
Lake Baikal is the deepest lake in the world, at 5,387 feet (1,642 meters) deep. It is also the oldest lake in the world, at 25 million years old. Lake Baikal is located in Siberia, Russia. It is a freshwater lake, and it is home to a variety of fish and other aquatic life.
Lake Baikal is a popular tourist destination. Visitors can go swimming, boating, and fishing in the lake. They can also visit the Baikal Museum, which is located on the shore of the lake.
The other options are incorrect because they are not as deep as Lake Baikal. Crater Lake is the deepest lake in the United States, at 1,943 feet (592 meters) deep. Lake Nyasa is the third deepest lake in Africa, at 2,702 feet (823 meters) deep. Lake Tanganyika is the second deepest lake in the world, at 4,706 feet (1,435 meters) deep.