Of the following pairs of structures, which are most similar? A.Parietal peritoneum and Visceral peritoneum B.Dorsal hollow nerve cord and Notochord C.Somite and Coelom D.Epidermis and Dermis E.Segmental and trans-segmental Solution The correct option is A. the parietal peritoneum and the visceral peritoneum is most similar as they both are made up of simple squamous epithelial cells called as the mesothelium..