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📚 Explanation

In the Application Layer of the OSI / TCP-IP model, email communication is handled using mail transfer protocols:

SMTP (Simple Mail Transfer Protocol) → Used for sending emails

POP (Post Office Protocol) → Used for receiving emails from the mail server

FTP is a file transfer protocol, and TCP is a transport layer protocol, so options (b) and (c) are incorrect.

Therefore, the correct answer is SMTP and POP.
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