A) \[\left[ {{a}^{2}}+4\left( \frac{\pi {{a}^{2}}}{9}-\frac{{{a}^{2}}}{3\sqrt{2}} \right) \right]\]
B) \[\left[ {{a}^{2}}+4\left( \frac{\pi {{a}^{2}}}{9}-\frac{{{a}^{2}}}{4\sqrt{3}} \right) \right]\]
C) \[\left[ 9{{a}^{2}}-4\pi +3\sqrt{3}\,{{a}^{2}} \right]\]
D) \[\left[ 9{{a}^{2}}+4\pi -3\sqrt{3}\,{{a}^{2}} \right]\]
E) None of these
Correct Answer: B
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