create Data Guard single physical standby from RAC

I've search Metalink as best as I could & did not find any Note which
details the steps to create a single physical standby database where
the Primary instance is a multi-node RAC.

I am more than eager to RTFM, if I could just find the correct FM to read.

If anyone could provide me a clue, I'd greatly appreciate it.

TIA!

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