A \( \left(\sqrt{2} \mathrm{a}, \frac{5 \pi}{4}\right) \)
B \( \left(\sqrt{2} a, \frac{\pi}{4}\right) \)
C \( \left(2 a, \frac{3 \pi}{4}\right) \)
D \( \left(2 \mathrm{a}, \frac{\pi}{4}\right) \)
E \( \left(2 \mathrm{a},-\frac{\pi}{4}\right) \)
Correct Answer: Option A
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