1. An array A[0..n-1] is sorted using the Insertion sort algorithm. The worst case and the best case running time of this computation respectively are
a. O (n log n) and O (n)
b. O (n2) and O (n)
c. O (n log n) and O (n log n)
d. O (n) and O (n log n)
option b is correct O(n2) and O(n)
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