Gravitation on moon is $\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$6^{th}$}\right.$ of that on earth. When a balloon filled with hydrogen is released on moon then, this :-

Will rise with acceleration $\left(\frac{g}{6}\right)$

Will rise with an acceleration less then $\left(\frac{g}{6}\right)$

Will fall down with an acceleration less than $\left(\frac{5g}{6}\right)$

Will fall down with acceleration $\left(\frac{g}{6}\right)$