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

The correct answer is b. Web browser.

Here's why:

a. Client: This is a broad term that refers to any device that receives data from a server, whether it's a web server, an email server, etc. So, while a client can retrieve information through a URL, it's not the most specific answer.

b. Web browser: This is the most specific 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 URL into a request to a specific web server, then interprets the data sent back and displays it for the user.

c. Web server: This is the computer program that serves requested web pages to users who have requested them via their browser. It's not used to retrieve information, but rather to provide it.

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