Pair 1 is correctly matched: Senguttuvan (also known as Cheran Senguttuvan or the Red Chera) was a prominent ruler of the Chera dynasty. He is celebrated in the Tamil epic *Silappadikaram* and is credited with establishing the Pattini (Kannagi) cult. Pair 2 is incorrectly matched: Udiyanjeral (Uthiyan Cheralathan) belonged to the Chera dynasty, not the Chola dynasty. He is considered the first historically recorded Chera ruler of the Sangam period and is famous in Sangam literature for the legend of feeding the rival armies during the Mahabharata war. Pair 3 is correctly matched: Nedunjeliyan was a famous king of the Pandya dynasty. Sangam literature mentions prominent Pandyan kings by this name, such as Nedunjeliyan II, who is renowned for his decisive victory at the Battle of Talaiyalanganam against a combined Chera and Chola force. Since the question asks for the pair(s) that are not correctly matched, only Pair 2 fits this criterion. Therefore, the correct option is B.