Answer: The correct answer is B) In the nucleus.
DNA ( deoxyribonucleic acid) is the genetic material of all living organisms. Plant and animals are eukaryotic organisms because they possess a well defined membrane bound nucleus. The genetic material of the eukaryotic cells is present in the nucleus.
It carries all the genetic information of the individual in the form of nucleotide sequences. This information is passed on from one generation to the next generation.
Thus, to know about the genetic material of plant and animal cells, we would look in the nucleus.