What is the output for the given python code?
def test(arr, a, b):
for i in range(0, a):
if (arr[i] == b):
return i
return -1
arr = [12, 9, 37, 86, 2]
b = 17
a = len(arr)
index = test(arr, a, b)
print(index)
1
5
2
4
3
0
4
-1