Which is monoatomic?

Two gases are enclosed in a container at constant temperature. One of the gases , which is monoatomic. The ratio of the rms speed of the molecules of the monoatomic gas to that of the molecules of the diatomic gas is .................... .

Which of the following is monoatomic ?

Which of the following is monoatomic?

Which of the following is monoatomic ?

Which of the following gaseous molecules is monoatomic?

Which of the following gaseous molecules is monoatomic ?

Which of the following gaseous molecules is monoatomic ?