For moon, its mass is \[\frac{1}{81}\] of earth's mass and its diameter is \[\frac{1}{3.7}\]of earth's diameter. If acceleration due to gravity of earth surface is\[\text{9}\text{.8 m}/{{\text{s}}^{\text{2}}}\], then at moon its value is

• A. \[\text{2}.\text{86 m}/{{\text{s}}^{\text{2}}}\]                                  
• B. \[\text{1}.\text{65 m}/{{\text{s}}^{\text{2}}}\]                                   
• C. \[\text{8}.\text{65 mi}{{\text{s}}^{\text{2}}}\]              
• D.                     \[\text{5}.\text{16 m}/{{\text{s}}^{\text{2}}}\]