Frequency at which a 10 microfarad capacitor has a reactance of 0.002 ohm

1. A.
   $\dfrac{25}{\pi}$ MHz
2. B.
   $\dfrac{20}{\pi}$ MHz
3. C.
   $2 \times 10^{-3}$ MHz
4. D.
   $10\pi$ MHz

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1. A.
   $\dfrac{25}{\pi}\,MHz$
2. B.
   $\dfrac{25}{\pi}\,Hz$
3. C.
   $2.5$ MHz
4. D.
   $\dfrac{2.5}{\pi}\,MHz$

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