\( \mathrm{A}, \mathrm{B} \) and \( \mathrm{C} \) are three elements forming part of a compound ...

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\( \mathrm{A}, \mathrm{B} \) and \( \mathrm{C} \) are three elements forming part of a compound in oxidation states of \( +2,+5 \) and \( -2 \) respectively. What could be the compound?
a. \( \mathrm{A}_{2}(\mathrm{BC})_{2} \)
b. \( \mathrm{A}_{2}\left(\mathrm{BC}_{4}\right)_{3} \)
c. \( \mathrm{A}_{3}\left(\mathrm{BC}_{4}\right)_{2} \)
d. math xmlns=http://www.w3.org/1998/Math/MathMLmiA/mimiB/mimiC/mi/math
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