If the uncertainty in velocities of two particles A and B with mass $1.0 \times 10^{-27}\;kg$ and $1.0 \times 10^{-31}\;kg$ respectively is the same , the ratio of uncertainty in the positions of A and B is :

Question

\[\begin {array} {1 1} (a)\;1000:1 & \quad (b)\;10,000 :1 \\ (c)\;1: 1000 & \quad (d)\;1:10000 \end {array}\]