Which of the following represents Avogadro's hypothesis ?

Options

A. Gases react together in volumes which bear a simple ratio to one another
B. Equal volumes of all gases under same conditions of temperature and pressure contain equal number of molecules
C. Equal volumes of all gases under same conditions of temperature and pressure contain equal number of atoms
D. The rates of diffusion of gases are inversely proportional to the square root of their densities

Answer

B