Q15 MCQ - want to know the correct ans

In Q 15 of MCQ i have selected O(n^2) as my ans but its incorrect.What should be the correct ans?

Ques 15 is The concept of order (Big O) is important because, can you please share statement of the question you are talking about

Please refer to the attached snap of Q -15 of MCQ in which I’m having doubt.

answer is O(n^2) only.

Okay thank you, It was showing incorrect so I wanted to confirm.

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