34. The root mean square speed of the molecules of a gas is

(a) Independent of its pressure but directly proportional to its Kelvin temperature

(b)  Directly proportional to the square roots of both its pressure and its Kelvin temperature

(c)   Independent of its pressure but directly proportional to the square root of its Kelvin temperature

(d)  Directly proportional to both its pressure and its Kelvin temperature

Answer-c

(9)