Two infinite non-conducting sheets with uniform surface charge densities $+\sigma$ and $-\sigma$ are placed parallel to each other at a distance $d$. A particle of mass $m$ and charge $q$ is released from rest from the positive sheet. What is the time taken to reach the negative sheet?

1. A.$\sqrt{\frac{2md{ϵ}_0}{q\sigma }}$
2. B.$\sqrt{\frac{md{ϵ}_0}{q\sigma }}$
3. C.$2\sqrt{\frac{md{ϵ}_0}{q\sigma }}$
4. D.$\sqrt{\frac{4md{ϵ}_0}{q\sigma }}$