Hamming distance here is as below
Max hamming distance = 10 (between 1'st and 5th & 2 nd and 3rd)
Min hamming distance = 4 (between 3rd and 4th )
1 1 1 1 1 0 0 0 0 0
1 1 1 0 0 0 0 0 1 1
XOR will give 0 0 0 1 1 0 0 0 1 1
so ans is 4 , no options are correct