$\begin{array}{|c|c|c|c|c|} \hline & A & B & C & D \\ \hline P & 5 & 4 & 12 & 6 \\ \hline V & 7 & 6 & 1 & 3 \\ \hline \end{array}$
$A.$ The $r.m.s$. velocity of gas molecules in two vessels will be the same.
$B.$ The ratio of pressure in these vessels will be $1: 4$
$C.$ The ratio of pressure will be $1: 1$
$D.$ The $r.m.s.$ velocity of gas molecules in two vessels will be in the ratio of $1: 4$

