Which one of the following statements is correct?

(a) Value of put + present value of exercise price = value of call + share price.

(b) Value of put + share price = value of call + present value of exercise price.

(c) Value of put - share price = present value of exercise price - value of call.

(d) Value of put + value of call = share price - present value of exercise price. The correct statement equates the value of two investment strategies. Plot the payoffs to each strategy as a function of the stock price. Show that the two strategies give identical payoffs.