Correct answer is (d) Deep Web
Explanation:
The Deep Web is anything which the standard search engines such as Google, Bing and Yahoo cannot search. Whereas, the surface web is that part of the web which can be indexed by any popular search engine.
The Deep Web contains mostly benign sites, such as your password-protected email account, certain parts of paid subscription services like Netflix, and sites that can be accessed only through an online form.
