. In the standard form of a rational numbers the denominator is always a
B: negative integer
C: positive integer
A rational number is number which is in the form p/q of where p,q aare integers and q≠0.
In standard form of rational number, the denominator is a positive number and numerator and denominator does not have any common factor other than unity.
So, in standard rational number, the denominator is always a positive number.
So, Option (C) is correct.
Thus, Option (C) is correct.