Let $r$ Denote the Real Interest Rate and I Denote the Nominal

Multiple Choice

Let $r$ denote the real interest rate and i denote the nominal interest rate; these two interest rates are related by:

A) $i = \pi$
B) $i = r - \pi$
C) $i = r + \pi$
D) $i = r / \pi$
E) None of these answers are correct.