MCQ
Vitamin ${B_{12}}$ contains metal
- A$Ca\, (II)$
- B$Zn \,(II)$
- C$Fe\, (II)$
- ✓$Co \,(III)$
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$(A)$ $\mathrm{Sc}$ $(B) \mathrm{Cr}$ $(C) \mathrm{V}$ $(D)$ $\mathrm{Ti}$ $(E)$ $\mathrm{Mn}$
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