In which of the following molecules the central atom does not use `sp^3` hybrid orbitals in its bonding?
In which of the following molecules the central atom does not use `sp^3` hybrid orbitals in its bonding?
A. `NH_2^-`
B. `BeF_3^-`
C. `SO_2Cl_2`
D. `SO_4^(2-)`
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