Mark the Correct alternative in the following:

The value of (i5 + i6 + i7 + i8 + i9)/(1 + i) is


We know that

i4n+1 = i


i4n+2 = i2 = -1


i4n+3 = i3 = -i


i4n+4 = i4 = 1


i5 + i6 + i7 + i8 + i9 = i + (-1) + (-i) + 1 + i


= i




1