The density of a gas 'X' is twice that of another gas 'Y'. If the molecular weight of gas 'Y' is 'M'; then the molecular weight of the gas 'X' will be
A
2M
B
$$\frac{{\text{M}}}{2}$$
C
M
D
$$\frac{{\text{M}}}{4}$$
Correct Answer: 2M
