(I'm Overwhelmed) Arithmetic Progress Quiz #10 Q11

I was solving this quiz and came across Q11, wherein the only possible answer (at least the only one I could find) does not match the conditions.
In the question, the 4th root of 567 is equated to a 4th root of b, where a>b. We have to solve for ab. Upon solving, the only possible answer is a=3 and b=7 and a*b=21. While β€œ21” is the correct answer, since (a=) 3 < 7 (=b), the condition a>b is not met. Kindly let me know if this is an error or if my solution is wrong.

Sorry that was a typo β†’ fixed.

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Can we consider 567 to be an answer as well? It doesn’t state anywhere that the root4 needs to be simplified, and hence, a = 1 and b = 567 can also be considered a possible solution.
(Obviously, I understand it is somewhat expected to simplify since we’ve learned that, but I am asking purely from a gre standpoint.)

As originally written, no since in that case, a < b.

But the actual question now has the condition that a < b. So a = 1 and b = 567 satisfies this

Sorry, yes you are right. This has been fixed.

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