Before Mt. Everest was discovered as the highest mountain in the world, which mountain was the highest?

Common Wrong Answers
“K2”
K2 is the second highest mountain in the world, but it was never the highest mountain since Mt. Everest existed even before it was discovered.
“Kangchenjunga”
Kangchenjunga is the third highest mountain, but like K2, it cannot be considered the highest since Mt. Everest was already the tallest even before it was officially recognized.
“Makalu”
Makalu is the fifth highest mountain in the world. Similar to the other guesses, it is not the correct answer because Mt. Everest has always been the highest mountain regardless of when it was discovered.
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