Which of the following protocols is best known for defining a set of rules that enable the sending and receiving of emails over the Internet?

Correct option is B

The correct answer is (b) SMTP.
Explanation:
● SMTP stands for Simple Mail Transfer Protocol.
● It is the primary protocol used for sending and receiving emails55.
Information Booster:
● HTTP: For web browsing.
● FTP: For file transfers.
● TCP/IP: The fundamental suite of protocols for the Internet.