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Wall function cannot be used when ___________

Wall function cannot be used when ___________ Correct Answer y+<30

For low Reynolds number turbulent models, wall function can be used to integrate the function. This wall function cannot be used if the value of y+ is not more than 30. If the value of y+ is less than 30, the wall function is invalid.

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If the first two statements are true, the third statement is :
I. All the offices on the 9th floor have wall-to-wall carpeting.
II. No wall-to-wall carpeting is pink.
III. None of the offices on the 9th floor has pink wall-to-wall carpeting.
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