Concept:A leap year is divisible by 4, except for century years that are not divisible by 400.Explanation:2004 is divisible by 4 → leap year.2012 is divisible by 4 → leap year.2018 is not divisible by 4 → not a leap year.2024 is divisible by 4 → leap year.Only 2018 does not follow the leap year rule.Answer:Option C (2018) is the odd one out.