A put option and a call option on a stock have the same expiration date and the same exercise (or strike) price. Both options expire in 6 months. Assume that put-call parity holds and interest rate is positive. If both call and put options have the same price, which one of the following true?

a. Put option is in-the-money

b. Call options is in-the-money

c. Both call and put options are in-the-money

d. Both call and put options are out-of-the-money