The correct answer is (d). Key Points Koil - Aligarh was known by the earlier name of Kol or Koil before the 18th century. Hence pair (a) is correct. The name Kol covered not only the city but the entire district, though its geographical limits kept changing from time to time. The origin of the name is obscure. In some ancient texts, Kol has been referred to in the sense of a tribe or caste, name of a place or mountain and name of a sage or demon. Mahotsav Nagar - Mahoba a small district in Uttar Pradesh is famous for its glorious history. It is known for its bravery. The stories Of Veer ALHA and UDAL define their importance in Indian history. Mahoba is a city located in the Indian state of Uttar Pradesh, in the Bundelkhand region. Mahoba is known for its closeness to Khajuraho, Laundi and other historic places like Kulpahar, Charkhari, Kalinjar, Orchha, and Jhansi. The name Mahoba is derived from Mahotsav Nagar, the city of great festivals. Hence pair (b) is correct. Mahoday Shree - Mahodaya was the name of Kannauj during the reign of Harshavardhana (606-647 AD). Hence pair (c) is correct. Mahodaya is also the name of a mountain mentioned in Ramayana. Jaijakbhukti - Jayashakti was a 9th-century ruler from the Chandela dynasty of Central India. Jayashakti succeeded his father Vakpati. He is also known as Jeja or Jejjaka. An inscription found at Mahoba states that the Chandela territory (later called Bundelkhand) was named "Jejakabhukti" after him. Hence pair (d) is incorrect. Kaushambi - Kosambi (Pali) or Kaushambi (Sanskrit) was an important city in ancient India. It was the capital of the Vatsa kingdom, one of the sixteen mahajanapadas.