Which of the following are valid types of swaps? I - Fixed-for-fixed interest rate swaps II - Floating-for-fixed interest rate swaps III - Floating-for-floating interest rate swaps IV - Fixed-for-floating interest rate swaps a. I and II b. I, II, and III c. I, II, III, and IV d. None of the options in this question are corr e. III, III, and IV