Answer the following question: Information:  - The Bithyni were a Thracian tribe who, along with the Thyni, migrated to Anatolia. Herodotus, Xenophon and Strabo all assert that the Bithyni and Thyni settled together in what would be known as Bithynia and Thynia. According to Herodotus, the Bithynian Thracians originally lived along the Strymon river, and were known as Strymonians.  - Paphlagonia was an ancient area on the Black Sea coast of north central Anatolia, situated between Bithynia to the west and Pontus to the east, and separated from Phrygia (later, Galatia) by a prolongation to the east of the Bithynian Olympus. According to Strabo, the river Parthenius formed the western limit of the region, and it was bounded on the east by the Halys river.  The name "Paphlagonia" is derived in the legends from Paphlagon, a son of Phineus. (Eustath. ad Horn. II. ii. 851, ad Dion. Per. 787; Steph. B. t.v.; Const. Porph. de Them. i. 7.)  - The Seljuk Empire or Great Seljuk Empire (also spelled Seljuq) was a medieval Turko-Persian Sunni Muslim empire, originating from the Qynyq branch of Oghuz Turks. The Seljuk Empire controlled a vast area stretching from the Hindu Kush to eastern Anatolia and from Central Asia to the Persian Gulf. From their homelands near the Aral sea, the Seljuks advanced first into Khorasan and then into mainland Persia before eventually conquering eastern Anatolia.  - Bithynia (Greek "Bithynia") was an ancient region, kingdom and Roman province in the northwest of Asia Minor, adjoining the Propontis, the Thracian Bosporus and the Euxine Sea. It bordered on Mysia to the south-west, Paphlagonia to the north-east along the Pontic coast, and Phrygia to the south-east towards the interior of Asia Minor. Bithynia was an independent kingdom from 4th century BC. Its capital Nicomedia was rebuilt on the site of ancient Astacus in 264 BC by Nicomedes I of Bithynia. Bithynia fell to the Roman Republic in 74 BC, and became united with the Pontus region as the province of Bithynia et Pontus, in the 7th century incorporated into the Byzantine Opsikion theme. It became a border region to the Seljuk Empire in the 13th century, and was eventually conquered by the Ottoman Turks in the 1330s.  - Ziaelas ( Greek :  ; lived c. 265 BC -- 228 BC , reigned c. 254 BC -- 228 BC ) , third king of Bithynia , was a son of Nicomedes I and Ditizele .    After reading the paragraphs above, we are interested in knowing the entity with which 'ziaelas of bithynia' exhibits the relationship of 'father'. Find the answer from the choices below.  Choices: - assert  - nicomedes i of bithynia  - persian gulf  - pontus
Answer:
nicomedes i of bithynia