Which of the following operations will not follow closure property for rational numbers?

The closure property for rational numbers states that when two rational numbers (numbers that can be expressed as a ratio of integers) are combined using the operations of addition, subtraction, multiplication, and division (provided the denominator is not zero), the result is also a rational number. 

So, the closure property for rational numbers is applicable for the operations of addition, subtraction, and multiplication, but not for division when the denominator is zero.