Which of the following is used to retrieve the information through URL (e.g. http://XYZ.com) on the World Wide Web?.a.Clientb.Cookiec.Web browserd.Web server

The correct answer is c. Web browser.

Here's why:

a. Client: This is a broad term that refers to any device that receives data from a server, including a web browser, but it's not specific enough for this question.

b. Cookie: This is a small piece of data stored on the user's computer by the web browser while browsing a website. Cookies are designed to be a reliable mechanism for websites to remember stateful information or to record the user's browsing activity. They don't retrieve information through a URL.

c. Web browser: This is the correct answer. A web browser is a software application used to locate, retrieve and display content on the World Wide Web, including Web pages, images, video and other files. It translates the coding language of the web in a way that allows us to understand and interact with it.

d. Web server: This is a system that hosts websites. It's a computer that runs websites' software applications (either static or dynamic). Its primary function is to deliver web pages on the request to the clients using the Hypertext Transfer Protocol (HTTP).