Assign the correct code for Column-$I$ and Column-$II$:
Column-$I$ (Coordination compound) Column-$II$ (Central metal atom)
$(a)$ Chlorophyll $(p)$ Rhodium
$(b)$ Blood pigment $(q)$ Cobalt
$(c)$ Wilkinson catalyst $(r)$ Calcium
$(d)$ Vitamin $B_{12}$ $(s)$ Iron
$(t)$ Magnesium

  • A
    $a-(t), b-(s), c-(p), d-(q)$
  • B
    $a-(r), b-(s), c-(t), d-(p)$
  • C
    $a-(s), b-(r), c-(q), d-(p)$
  • D
    $a-(r), b-(s), c-(p), d-(q)$

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