The correct answer is Option 2.Concept:The most commonly used Email protocols on the internet “ POP3, IMAP, and SMTP. Post Office Protocol 3 is the most commonly used protocol for receiving email over the internet. This standard protocol, which most email servers and their clients support, is used to receive emails from a remote server and send them to a local client.Internet Message Access Protocol is a protocol for accessing email or bulletin board messages from a mail server or service. IMAP allows a client e-mail program to access remote message stores as if they were local.The Simple Mail Transfer Protocol is the industry standard for sending emails over the Internet.The correct answer is (ii), (iii), and (iv).