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The answer to the “Jeopardy” clue “Alex Trebrek’s replacement” has a new and surprising question:

“Who is Matt Lauer?”

The beleaguered host of the “Today” show is at the top of the list to take over the brainy game show when Trebek steps down, as expected, in 2016, knowledgeable sources tell The Post.

Lauer is widely reported to be on his way out at the morning show, which has tumbled to No. 2 in the ratings in the last year. He is being blamed for the show’s fall from grace after 16 years on top.

The Post reported this week that Lauer is not expected to re-sign with “Today” when his blockbuster, $25-million-a-year deal expires in 2015.

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By coincidence, that’s about the time Trebek is expected to end his three-decade run as the host of the habit-forming game show.

Sony Pictures Television, which owns the hugely profitable show, has quietly been feeling out TV personalities in recent months to see who might be available and willing to take on the role in 2016, sources say.

Go to The Post for the full report.