Heat and Thermodynamics

Same gas is filled in two vessels of the same volume at the same temperature. If the ratio of the number of molecules is $$1: 4$$, then 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 $$1: 4$$. Choose the correct answer from the options given below :