AP and TS EAMCET Engineering Model Paper 16

Which of the following are correct regarding adsorption?
(A) Physical adsorption is reversible, chemical adsorption is irreversible.
(B) Change in enthalpy of physical adsorption is less than that of chemical adsorption.
(C) Physical adsorption is unilayered, chemical adsorption is multilayered.
(D) Physical adsorption is not specific in nature, chemical adsorption is highly specific in nature.