The minmum number of inter changes needed to convert the array 89,19,40,17,12,10,2,5,7,11,6,9,70 into a heap with maximum element at the root is

The minmum number of inter changes needed to convert the array 89,19,4

1.	The minmum number of inter changes needed to convert the array 89,19,40,17,12,10,2,5,7,11,6,9,70 into a heap with maximum element at the root is
A.	1
B.	2
C.	4
D.	None of these
Answer» C. 4