28. A mutation is any change in the base sequence of the DNA. Which one of the following descriptions about mutations is WRONG ? (A) An adenosine replaced by a cytidine is a "transversion" mutation (B) An adenosine replaced by a guanosine is a "transition" mutation (C) A nonsense mutation results in a different amino acid being inserted in the protein (D) Silent mutation means a change at the DNA level that does not result in any change of amino acid in the encoded protein. (E) All are right.