which of the following statement `is//are` correct?
A. Maximum number pof atom present in same plane in `BrF_(5)` are 5
B. In `O(SiH_(3))_(2) p_(n)-d_(n)` back bonding is present while in `BF_(3) P_(n) -P_(n)` back bonding is present
C. Pyroxene chain silicate and 5 memebered cyclic silicate both have 2 number of corner shared per tetrahedron.
D. Number o flone pair on central atom of `ICI_(4)^(ominus)` is 2
