Which one of the following is NOT a search engine?

Correct option is A

The correct answer is (a) Instagram.

• Instagram is a social media platform primarily used for sharing photos and videos.
• It is not designed to function as a search engine, though it has a search feature to find content within the platform.
• Google, Yahoo, and Bing are all search engines that allow users to search for information on the internet.
• They index websites and provide search results based on keywords entered by users.

Information Booster:

• Google: The most widely used search engine globally, known for its powerful algorithms and vast index of websites.
  
• Yahoo: A web service provider that also functions as a search engine, offering a wide range of internet services.
  
• Bing: A search engine developed by Microsoft, known for its integration with other Microsoft services and products.