Which of the following operator in Google search will you use to achieve this?

You are footprinting the www.xsecurity.com domain using the Google search engine. You would like to determine what sites link to www.xsecurity.com at the first level of relevance. Which of the following operator in Google search will you use to achieve this?

A.
link:www.xsecurity.com

B.
search?l:www.xsecurity.com

C.
pagerank:www.xsecurity.com

D.
level1:www.xsecurity.com

Explanation:
The query [link:] will list webpages that have links to the specified webpage. For instance, [link :www.google.com ] will list webpages that have links pointing to the Google homepage. Note there can be no space between the “link:” and the web page url .