Successive ionisation energies of an element is represented as follows
`A underset(IE_1)(rarr)A^(+)underset(IE_2)(rarr)A^(2+)underset(IE_3)(rarr)A^(3+) to ….A^(n +)`
Which of the following statement is correct? 

Options

A. In some of the elements `IE_2` values may be negative.
B. `IE_ of A^(3+) = IE_2` of `A^(+)`.
C. Successive electron affinity of `A^(n+)` is gradually decreasing.
D. None of these is correct.

Answer

C