On the modern Internet, which of the following is NOT a web search engine but instead primarily an e-commerce website?

Introduction / Context:
Search engines are specialised web services that allow users to enter keywords and receive lists of relevant web pages. Examples include Google and Bing. However, many other websites focus on specific functions such as shopping, social networking, or news and are not primarily search engines. This question tests whether you can distinguish between general purpose search engines and a popular e-commerce site.

Given Data / Assumptions:

• The options are Google, Myntra, Bing, and Yahoo.
• We assume their commonly known roles on the Internet.
• Search engines index and search the wider web.
• E-commerce sites mainly sell products and services online.

Concept / Approach:
Google is the most widely used web search engine worldwide, providing results for almost any query. Bing is another major search engine developed by Microsoft. Yahoo historically offered a search engine and still provides search services along with email and news. Myntra, in contrast, is a popular e-commerce platform that focuses on fashion, clothing, and lifestyle products. Although it may have a product search bar, it does not search the entire web and is therefore not a general purpose search engine. Thus, Myntra is the correct option that is not a search engine.

Step-by-Step Solution:
Step 1: Identify known search engines. Google is globally recognised as a leading web search engine. Step 2: Check Bing. Bing is Microsoft's web search engine, indexing and returning web pages from across the Internet. Step 3: Check Yahoo. Yahoo historically operated a web directory and search engine and still offers search services to users. Step 4: Examine Myntra. Myntra is an Indian e-commerce website that sells clothing and lifestyle products and does not function as a general web search engine. Step 5: Conclude that Myntra is the site that is not a search engine.

Verification / Alternative check:
If you visit Google, Bing, or Yahoo, the main interface displays a search box intended for entering general queries about any topic. Search results include websites from many domains. In contrast, Myntra's interface is built around product categories, shopping carts, and offers. Its internal search bar only searches items in its own catalogue, not the whole Internet. This distinction confirms that Myntra is not a general purpose search engine but an e-commerce platform.

Why Other Options Are Wrong:
Option A (Google): A core example of a web search engine. Option C (Bing): A well known search engine operated by Microsoft. Option D (Yahoo): Offers web search along with other portal features such as mail and news.

Common Pitfalls:
A common mistake is to think that any website with a search box is a search engine. Many sites, including online shops and social networks, have internal search functions but do not search the wider web. In exams, search engine refers to a service that indexes and retrieves results from many different websites, not just its own content. Keeping this distinction in mind makes it easy to identify Myntra as the non search engine among the options.

Final Answer:
Myntra is not a web search engine; it is primarily an e-commerce website, unlike Google, Bing, and Yahoo.