C-value paradox means

The c-value paradox means Genome complexity is independent of genome size.
C-value is the amount, in picograms, of DNA contained within a haploid nucleus or one-half the amount in a diploid somatic cell of a eukaryotic organism.
In some cases, the terms C-value and genome size are used interchangeably. However, in polyploids, the C-value may represent two or more genomes contained within the same nucleus.
The C-value enigma or C-value paradox is the complex puzzle surrounding the extensive variation in nuclear genome size among eukaryotic species.