Given the task definition and input, reply with output. In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).

Context: Rajaraja Chola II succeeded his father Kulothunga Chola II to the Chola throne in 1150. He was made his heir apparent and coregent in 1146 and so the inscriptions of Rajaraja II count his reign from 1146. Rajaraja's reign began to show signs of the coming end of the great dynasty., Kulothunga Chola II was a 12th-century king of the Chola Dynasty of the Tamil people of South India. He succeeded his father Vikrama Chola to the throne in 1135 CE. Vikrama Chola made Kulothunga his heir apparent and coregent in 1133 CE, so the inscriptions of Kulothunga II count his reign from 1133 CE. , Rajadhiraja Chola II ( 1166 -- 1178 CE ) reigned as the Chola king succeeding Rajaraja Chola II. According to historian N. Sethuraman , Rajadhiraja was not the direct descendant of Rajaraja Chola II but was a son of his sister . Rajaraja Chola II chose Rajadhiraja as his heir in 1166 as he did not have any sons of his own . Soon after the installation of Rajadhiraja II , a fierce succession dispute in the Pandya country led to the intervention of the Chola and the Sinhalese rulers on opposite sides which brought misery to both . Out of the ashes of this civil war arose the Pandya power which in its renewed strength soon swallowed both the Chola and Sinhalese kingdoms ., Subject: rajadhiraja chola ii, Relation: father, Options: (A) rajaraja chola ii (B) vikrama chola
vikrama chola