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1.3 ​Which of the following is true about sorting functions?A.The most optimal partitioning policy for quicksort...

1.3 ​Which of the following is true about sorting functions?A.The most optimal partitioning policy for quicksort on an array we know nothing about wouldbe selecting a random element in the array.B.The fastest possible comparison sort has a worst case no better than O(​n​ log ​n​).C.Heapsort is usually best when you need a stable sort.D.Sorting an already sorted array of size ​n​ with quicksort takes O(​n​ log ​n​) time.E.When sorting elements that are expensive to copy, it is generally best to use merge sort.F.None of the above statements is true.

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Answer #1 
B is true because the best possible worst case that's possible when using comparison based sorting is O(n logn)

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