If the common stock of Company X is $100 per share, and the price of 3-month call option at an exercise price of $100 is $10. If the risk-free interest rate is 8% per year and no arbitrage opportunity exists, what would be the price of 3-month put option on this stock at an exercise price of $100? (Hint: use put-call parity)

a. $7.65

b. $8.56

c. $10.00

d. $8.09