A) \[{{\vec{B}}_{1}}={{\vec{B}}_{2}}\]
B) \[\left. \left| {{{\vec{B}}}_{1}} \right. \right|=\left| 2\left. {{{\vec{B}}}_{2}} \right| \right.\]
C) \[{{\vec{B}}_{1}}=-{{\vec{B}}_{2}}\]
D) \[{{\vec{B}}_{1}}=-\,2{{\vec{B}}_{2}}\]
Correct Answer: C
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