The stability of dihalides of Si,Ge, Sn and Pb follows the sequence.

Options

A. `SiX_(2) lt GeX_(2) lt PbX_(2)lt SnX_(2)`
B. `SiX_(2) lt GeX _(2) lt SnX_(2) lt PbX_(2)`
C. `PbX _(2) lt SnX_(2) lt GeX_(2) lt SiX _(2)`
D. `GeX_(2) lt SiX_(2) lt SnX_(2) lt PbX_(2)`

Answer

B

Explanation

Due to inert pair effect, the syability of `+2` oxidatin state increases as we move down the group.