"What is, 'We love you, Alex,'" Trebek read from Gaur's blue screen. "That's very kind. Thank you."
The 79-year-old then paused and took a deep breath, appearing to hold back tears before unveiling Gaur's wager.
"Cost you $1,995," Trebek continued, still visibly emotional. "You're left with $5."
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After the episode aired, Gaur, who finished behind the two other contestants, took to Twitter to explain his actions.
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"For context, Alex had just shared with us that he was re-entering treatment for pancreatic cancer. We were all hurting for him so badly," Gaur wrote. "When Final Jeopardy came up, I could've tried to puzzle it together, but really, just kept thinking about Alex, and thought he should know."
He added: "I'm just very grateful I got the opportunity to say what I know everyone was thinking. Sending all the love."
Gaur tagged the post, "#weloveyoualex."
Fellow fans praised Gaur's move.
"Thank you for doing so," Twitter user @MizCoretta replied. "Yours will always be the correct answer. You're awesome."
"It was perfect," wrote @JenDurant3. "In my mind, you won final #Jeopardy."
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