Periclymenus was a son of Neleus and brother of Nestor, prince of which city?

Periclymenus, as a son of Neleus and brother of Nestor, is closely connected to the city of Pylos, which is situated in the region of Messenia in the Peloponnese. Nestor is particularly renowned in Greek mythology and literature as a wise king and warrior who played a significant role during the Trojan War. His rule over Pylos is well-documented in Homeric texts. Pylos is portrayed as a prosperous and influential city during that time, making it a fitting home for Nestor and his family. The historical and mythological significance of Pylos, along with its connection to both Nestor and Periclymenus, solidifies B as the correct answer.