[SiF6]2−
[GeCl6]2−
[Sn(OH)6]2−
[SiCl6]2−
Correct option is D. [SiCl6]2−
Due to the presence of d-orbitals in Si, Ge, and Sn, they form species like [SiF6]2−, [GeCl6]2−, [Sn(OH)6]2−. But [SiCl6]2− does not exist because six large chloride ions cannot be accommodated around Si4+ due to the limitation of its size.