The calculated spin only magnetic moments of $$[Cr(NH_3)_6]^{3+}$$ and $$[CuF_6]^{3-}$$ in BM, respectively, are (Atomic numbers of Cr and Cu are 24 and 29, respectively)

A

3.87 and 2.84

B

4.90 and 1.73

C

3.87 and 1.73

D

4.90 and 2.84