Final answer:
The real interest rate can be calculated by subtracting the inflation rate from the nominal interest rate. In this case, it is 2 percent.
Step-by-step explanation:
The real interest rate can be calculated by subtracting the inflation rate from the nominal interest rate. In this case, the nominal interest rate is 4% and the inflation rate is 2%. So, the real interest rate would be 4% - 2% = 2%. Therefore, the correct answer is option 2) 2 percent.