For moon, its mass is 1/81 of earth mass and its diameter is 1/3.7 of earth dia.If acceleration due to gravity at earth surface is $9.8 m/s ^{2}$ then at moon its value is :

Question

( A ) $1.65 m/s^{2}$
( B ) $8.65 m/s^{2}$
( C ) $5.16 m/s^{2}$
( D ) $2.86 m/s^{2}$