The given information can be analysed as follows :
|
A |
B |
C |
D |
E |
F |
Historical |
x |
x |
√ |
x |
x |
√ |
Industrial |
√ |
x |
√ |
x |
√ |
√ |
Hill Stations |
x |
√ |
√ |
√ |
√ |
√ |
Since A and B are not alike and because A is industrial, B cannot be industrial but only a hill station.
So, we put a cross for B across industrial.
Clearly, A, C, E, and F are industrial centres, So, the answer is (b).