q.16 The current price of a stock is $20.50. Both call options and put options on this stock (at the same strike and with the same maturity are available) and they cost exactly the same amount. The risk free rate continuously compounded is 5% pa, and the time to maturity of the options is 1 year.

What is the strike price of the options?

Select one:

$21.55

$19.50

$20.50

$18.50