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Consider the following complex ions $P=\left[FeF_6\right]^{3-}$ $Q=\left[V\left(H_2 O\right)_6\right]^{2+}$ $R=\left[Fe\left(H_2 O\right)_6\right]^{2+}$ The correct order of the complex ions, according to their spin only magnetic moment values $($in $B.M.)$ is :

• A
  R $<$ Q $<$ P
• B
  R $<$ P $<$ Q
• C
  Q $<$ R $<$ P
• D
  Q $<$ P $<$ R