Concept:The series follows cubes of consecutive odd numbers, so find the term that breaks this pattern.Explanation:Given series: 1,27,125,216,729.Write each term as a cube:1=1327=33125=53216=63729=93The correct pattern should be 13,33,53,73,93.So the fourth term should be 73=343, not 216.Hence, 216 is the wrong term.Answer:216 is the odd term, which is Option C.