The transport layer protocols used for real time multimedia, file transfer, DNS and email, respectively are

A TCP, UDP, UDP and TCP

B UDP, TCP, TCP and UDP

C UDP, TCP, UDP and TCP

D TCP, UDP, TCP and UDP

Answer & Explanation
Answer: Option [C]

i.e. UDP, TCP, UDP and TCP

UDP stands for User Datagram Protocol and it is mostly used for real time multimedia transmission

TCP stands for Transmission Control Protocol and it is used for secure and reliable transfer. TCP guarantees delivery of file.

Generally DNS uses UDP as transport layer protocol.

Email uses TCP as transport layer protocol.

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