Which of the following is not true?

Group of answer choices

a. Compound interests are higher than simple interest assuming the rate of return is higher than zero.

b.Holding all others equal, the present value of annuities or perpetuities are higher if the discount rate gets higher, as it would indicate that the present value of the future cash inflows will increase.

c.The formula for present value can be easily derived from the formula for future value.

d. None of the above (all of the above are correct statements).