question_answer

Which of the following statements) is/are correct?

(i) Antigen is usually a foreign body which causes the formation of antibody.

(ii) Antibody is a protein molecule.

(iii) Antigen can be either protein o polysaccharide molecule.

(iv) Antibody joins an antigen to destroy the latter.

A) (i) and (ii)

B) (i) and (iii)

C) All are incorrect                         

D) All are correct