What is not true for genetic code?

Salient features of the genetic code: the codon is a triplet; one codon codes for only one amino acid, so the code is unambiguous and specific; some amino acids are coded by more than one codon, so the code is degenerate; the code is nearly universal.
The codon is read in mRNA in a contiguous fashion; there are no punctuations (commas) between codons.
So the statement that a codon is read in a non-contiguous fashion is not true.
Hence the answer is 'A codon in mRNA is read in a non-contiguous fashion'.