The set of all number of the form p/q where ______ is called the set of rational numbers.

p, q are integers and q ≠ 0

p, q are integers and q = 0

p, q are natural numbers and q = 0

None of these

The correct definition of rational numbers is:

The set of all numbers of the form p/q where p and q are integers and q ≠ 0.

This is because rational numbers are defined as the ratio of two integers, with the denominator (q) being non-zero.