What will be the acceleration due to gravity on the surface of moon if its radius is\[{}^{1}/{}_{4}\]th the radius of the earth and its mass is\[{}^{1}/{}_{80}\]th the mass of earth?

• A.  \[\frac{g}{2}\]                                                  
• B.  \[\frac{g}{3}\]   
• C.  \[\frac{g}{7}\]                                                  
• D.  \[\frac{g}{5}\]