A) chemical change in DNA molecule
B) production of antibodies
C) synthesis of macromolecules
D) invasion of foreign micro-organism
Correct Answer: A
Solution :
(i) The mutation is sudden change in DNA molecule. DNA molecule is responsible for synthesis of proteins. (ii) Invasion of foreign micro-organism may cause disease. (iii) Antibodies are chemicals which our body produces against foreign matter which enter our body.
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