Option c is the correct answer. According to the Puranas, the prime place of Chandravansh's ruler was Ayodhya, the capital of the Kosala kingdom. Ayodhya was the birthplace of Rama, the seventh avatar of Vishnu and the hero of the Ramayana. Rama belonged to the Suryavansha branch of the Chandravansh, which traced its lineage from Ikshvaku, the son of Manu. Ikshvaku was also the ancestor of other famous Chandravanshi kings such as Harishchandra, Sagara, Bhagiratha, and Dasharatha. Ayodhya was also known as Saketa, Ram Janmabhoomi, and Ram Nagari. It is one of the seven sacred cities of Hinduism and a major pilgrimage site.