The stock price is $$100.$ The interest rate is $5\%.$ A European Call option on the stock, with a strike price of $$105$ and expiration in one year, is worth $$18\mathrm{.}50.$ How much is a European Put option, with the same strike price and maturity, worth? The stock is not expected to pay dividend during the year.

$$15\mathrm{.}50$

$$18\mathrm{.}50$

$$19\mathrm{.}50$

None of the above No answer can be found