Correct Answer - Option 4 : Voice controlled digital assistant
Cortana is a virtual assistant developed by Microsoft, which uses the Bing search engine to perform tasks such as setting reminders and answering questions for the user.
It is currently available in English, Portuguese, French, German, Italian, Spanish, Chinese, and Japanese language editions, depending on the software platform and region in which it is used.
Microsoft began reducing the prevalence of Cortana and converting it from an assistant into different software integrations in 2019
