Helium is heavier than hydrogen. Yet helium is used (instead of `H_(2)`) in filling baloons for meteorological observations - Why ?

Which noble gas is used in filling balloons for meteorological observations ?

Which noble gas is used for filling balloons for meteorological observations?

(A) Helium is preferred than hydrogen in filling ballons for meterological observations (R) Helium is lighter than hydrogen and it is non-combustible in nature

Explain why: Helium is used for filling weather balloons.

Helium is preferred to hydrogen for filling balloons because it is :

Helium is not used to fill gas balloons. True/False