(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
Correct Answer: D
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