Asseration: `SeCl_(4)`, does not havea tetrahedral structure.
Reason: `Se` in `SeCl_(4)` has two lone pairs.

Answer

C

Explanation

`SeCI_(4)` has distorted Tbp structure hence `(A)` is correct Correct `(R )` Se and `SeCI_(4)` have one lone pair Valence elctronic configuration of Se in ground state is `4s^(2),4p_(x)^(2),4p_(y)^(1),4p_(z)^(1)`
Excited state `4s^(2),4p_(1)^(x) 4p_(y)^(1) 4p_(z)^(1) 4d^(1)`
In the Tbp structure one position of the triangular base is occupied by one lp The distortion in the shape is due to this lp .