Answer: Option 'D' is correct.
Explanation:
Since we have given that
Principal amount = p
Rate of interest = r
Time = t
Using "Simple Interest ", we know that how to find the simple interest :
![S.I.=(p* R* t)/(100)\\\\S.I=prt,\\\\here,\ r=(R)/(100)](https://img.qammunity.org/2019/formulas/mathematics/college/tor24hlzwscbkwwdus2b62ulezhd8iuoiz.png)
And we have also given that I = prt.
Equating both the expression, we get that
I denotes "Simple Interest".
Hence, Option 'D' is correct.