The correct option is A Segregation
The law of segregation states that every individual contains a pair of alleles for each particular trait which segregate or separate during cell division for any particular trait and that each parent passes a randomly selected copy called as allele to its offspring. The offspring then receives its own pair of alleles of the gene for that trait by inheriting sets of homologous chromosomes from the parent organisms. Interactions between alleles at a single locus are termed dominance and these influence how the offspring expresses that trait. The law states that when any individuals produces gametes, the copies of a gene separate so that each gamete receives only one copy allele. A gamete will receive one allele or the other.