`I_(1)` of an element X is `899" kJ mole"^(-1)` and that of another element Y is `801" kJ mole"^(-1)`. Then

`I_(1)` of an element X is `899" kJ mole"^(-1)` and that of another element Y is `801" kJ mole"^(-1)`. Then X and Y may be
A. `Li, Be`
B. `Be, B`
C. `B, C`
D. `C, N`

`I_(1)` of an element X is `899" kJ mole"^(-1)` and that of another element Y is `801" kJ mole"^(-1)`. Then X and Y may be

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