In total dominance, the phenotype sees only one allele in the genotype. Both alleles in the genotype are seen in the phenotype during codominance. In incomplete dominance, in the phenotype, a mixture of the alleles in the genotype is seen.
I can't understand your option because there is no full stop however
isotopes are 2 or more form of elements that contain equal number of proton but different number of neutron in their nuclei
I think A but I’m not sure so
