Two elements X and Y have following elec...

Two elements `X and Y` have following electronic configurations.
`X: 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 4s^(2)`
`Y: 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(5)`
The expected compound formed by combination of X and Y will be expresed as

A

`XY_(2)`

B

`X_(5)Y_(2)`

C

`X_(2)Y_(5)`

D

`XY_(5)`

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