Concept:The series follows a fixed pattern, so the term that breaks it is the odd one out.Explanation:Check the expected terms using the pattern n2−(n−2):42−2=1452−3=2262−4=3272−5=4482−6=58The given first term is 18, but the pattern requires 14.So, 18 is the wrong term.Answer:18 is the odd man out, i.e. Option C.