The minimum uncertainty in de Broglie wavelength of an electron acc...

The minimum uncertainty in de Broglie wavelength of an electron accelerated from rest by a potential difference of \( 6.0 \mathrm{~V} \), if the uncertainty in measuring the position is \( \frac{1}{\pi} \mathrm{nm} \), is
(a) \( 6.25 \AA \)
(b) \( 6.0 \AA \)
(c) \( 0.625 \AA \)
(d) \( 0.3125 \AA \)