Which of the following is not a type of computer network
options
local area network
metropolitan area network
city area network
wide area network?

The answer is City Area Network.
Local Area Network, Metropolitan Network, and Wide Area Network are only some of the types of network. LAN is a network of computers in a single site usually in a single office building. While MAN, is a network of computer across an entire city or a small region. WAN is a very large area of network such as the Internet.