以下哪个序列对应数组0至8的4位二进制格雷码(Gray code)?
0000,0001,0011,0010,0110,0111,0101,1000
0000,0001,0011,0010,0110,0111,0100,0101
0000,0001,0011,0010,0100,0101,0111,0110
0000,0001,0011,0010,0110,0111,0101,0100