Which of the following statements are not correct:-
| A. |
The electron affinity of 'Si' is greater than that of C |
| B. |
BeO is amphoteric while `B_2O_3` is acidic |
| C. |
The ionisation energy of 'Ti' is less than that of Al |
 |
| D. |
The ionisation energy of elements of 'Cu' group is less than that of the respective elements of Zn-group |