Pick out the wrong statement pertaining to ‘Horton sphere’ used for the storage of liquid ammonia ?

Question

Accepted Answer

Thickness of spherical shell is half that of the cylindrical vessel under same operating pressure condition. Besides, the ratio of surface area to volume is less for sphere than any other shape; hence insulation required is less. The statement in option D is incorrect because Horton spheres are generally used for moderate pressure storage, not very high pressures up to 200 kg/cm2.