If adsorption of a gas on a solid is limited to monolayer formatin , then which of the following statement are ture ?
A. At low pressures `x/m` varioes proportionately with P
B. At moderate pressures, `x/m` varies less than proportiontely with P
C. At high pressure ,` x/m` becomes inderpendent of P
D. at high pressue , `x/m` varies more than proportiontely with P
