Which of the following is true for a put option on a non-dividend-paying stock? 

		If the option is at the money (stock price equals strike price) it must have a delta of 0.5
		If the strike price equals the current price of the stock, it must have a delta of minus 0.5
		If the option has a delta of minus 0.5, it must be out of the money.
		If the option has a delta of minus 0.5, it must be in the money.