Yes option b is the incorrect as exor gate gives output on getting odd number of 1's else output will be 0,
A) contains odd number of 1's so output is 1
B)contains even number of 1's so output should be 0..but it is given 1.
C) contains odd number of 1's so output should be 1 yes it is 1.
D)even number of 1's so output should be 0..yes it is zero.