Which of the following is not a leap year?

Leap year rule: A year is a leap year if it is divisible by 4, except that years divisible by 100 are not leap years unless they are also divisible by 400.

• Step 1: If the year is divisible by 400 → leap year.

• Step 2: Else if divisible by 100 → not a leap year.

• Step 3: Else if divisible by 4 → leap year; otherwise not a leap year.

• 700: divisible by 100 but not by 400 → not a leap year.

• 800: divisible by 400 → leap year.

• 1200: divisible by 400 → leap year.

• 2000: divisible by 400 → leap year.

Therefore, 700 is the only year among the options that is not a leap year.