Speech to Speech and Speech to Text is correct.

Speech to speech translation provides end to end real time multilingual audio translation by transcribing the incoming speech, translating the transcript, and synthesizing the translated text back into audio. The Speech Translation endpoint implements this full pipeline so it can deliver translated audio streams for applications and devices.

Speech to text translation returns the translated text transcript of incoming speech in real time. The same endpoint can emit translated text instead of synthesized audio so it supports speech to text as a distinct output mode alongside speech to speech.

Speech to Text and Text to Speech is incorrect because that pairing implies separate conversion of speech to text and independent synthesis from raw text, and it does not emphasize the end to end real time speech to speech translation capability provided by the endpoint.

Text to Speech and Speech to Speech is incorrect because text to speech refers to converting text into audio and it does not represent translating incoming spoken audio into text. The option mixes a text input feature with a speech translation feature and so it does not accurately name the two modes the endpoint supports.

Content to Speech and Speech to Content is incorrect because those are not standard or precise translation modes for speech translation. The endpoint is described in terms of speech to speech and speech to text outputs, so the ambiguous terms in this option do not match the documented capabilities.

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