The correct options are
A Tetraamminecobalt (III)-μ- amido-μ-nitrito-n
tetraamminecoball (III) nitrate
B μ-Amido-μ-nitrito- N-octaamminedicobaIt (III)
nitrate
C μ- Amido-μ-nitrito -N-bis(tetraammine)dicobalt
(III) nitrate
Option (A),(B),(C) are correct.
The correct I.U.P.A.C. name for [(NH3)4CoNH2NO2Co(NH3)4](NO3)4 complex is tetraamminecobalt (III)-μ- amido-μ-nitrito-n tetraamminecoball (III) nitrate or
μ-amido-μ-nitrito- N-octaamminedicobaIt (III) nitrate or
μ- amido-μ-nitrito -N-bis(tetraammine)dicobalt(III) nitrate