What is the name given to a large apartment in Amazon basin having a steeply slanting roof?

Which of the following countries forms a part of Amazon River basin?

Which one of the following is part of the Congo Basin?

Which one of the following cities is not a former capital of the given country (Country given in the brackets)?

The major portion of the Great Artesian Basin in Australia is located in

Which of the following countries is not larger than India in terms of Area?