A) \[\left| \left. {{L}_{1}} \right| \right.=\left| \left. {{M}_{21}} \right| \right.\]
B) \[{{M}_{21}}>{{L}_{1}}\]
C) \[{{L}_{1}}=-{{L}_{2}}\]
D) \[{{M}_{12}}=-{{M}_{21}}\]
Correct Answer: A
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