The correct answer is (a) Google.
Google is a search engine that was founded in 1998 by Larry Page and Sergey Brin. It is the most popular search engine in the world, and it is used by billions of people every day. Google allows users to search for information on the internet, and it provides a variety of other services, such as email, maps, and document storage.
(b) A plotter is a device that is used to create drawings or maps. It does this by drawing lines on paper using a pen or pencil.
(c) A protocol is a set of rules that govern how computers communicate with each other.
(d) An intranet is a private network that is used by a company or organization. It is similar to the internet, but it is not accessible to the public.