What kind of fraction is irrational?

1) an improper fraction
2) a fraction with π as the numerator or denominator
3) a fraction with 0 in the numerator
4) a fraction with a negative integer as the numerator

The correct answer is option 2) a fraction with π as the numerator or denominator.

An irrational fraction is a fraction where the numerator or denominator (or both) involves irrational numbers. So, the answer is:

2) a fraction with π as the numerator or denominator