A) \[\pm 4\]
B) \[\pm 6\]
C) \[\pm 1\]
D) \[\pm 8\]
Correct Answer: B
Solution :
\[c=\pm \sqrt{{{b}^{2}}+{{a}^{2}}{{m}^{2}}}=\pm \sqrt{4+8.4}=\pm 6\].
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