Concept:Odd man out series: check whether the numbers follow a constant difference pattern.Explanation:Start the series with 323.The expected differences are +5,+7,+9,+11,+13.So the terms should be:323323+5=328328+7=335335+9=344344+11=355355+13=368The given term 326 breaks this pattern.It should be 328.Answer:The odd term is 326 (Option C).