Which of the following pairs of portfolios have the same payoff?

(A) a risk-free bond that promises $100 in three months; (B) a short call and a long put both struck at $100 with expiration date of three months and the underlying stock

(A) a risk-free bond that promises $100 in three months; (B) a long call and short put both struck at $100 with expiration date of three months and the underlying stock

(A) a risk-free bond that promises $100 in three months; (B) a long call and a long put both struck at $100 with expiration date of three months and the underlying stock

(A) a risk-free bond that promises $100 in three months; (B) a short call and short put both struck at $100 with expiration date of three months and the underlying stock