X mL of $H_2$ gas effuses through a hole in a container is 5 Second. The time taken for the effusion of the same Volume of the gas Specified below under identical conditions is

Question

$(a)\;10 Seconds ; He\qquad(b)\;20 Seconds ; O_2\qquad(c)\;25 Seconds ; CO\qquad(d)\;55 Seconds ; CO_2$