Q. Which among the following is NOT a search engine?
Answer: Wolfram Alfa 
Notes: Wolfram Alfa is a computational knowledge engine or answer engine and not a search engine. Goodle, Baidu and yahoo are the search engines as a person can search anything on web using these.

This Question is Also Available in:

हिन्दी
Question Source: 📚This question has been sourced from GKToday's "40000+ GK / General Studies MCQs for SSC & State PCS Exams" App Exclusive Course in GKToday Android Application which provides more than 40K General Knowledge and General Studies questions with explanations asked in all Competitive Exams of India. Download the app here.
📌 Question Number: 7 in 7. Websites, Blogs, Search Engines & Social Media in the above course in App.