1, You short a put with strike K. The underlying price at expiration is S. What's your payoff?

a, S - K if K > S and zero otherwise

b, 0

c, K - S

d, S - K

2, What's the payoff at maturity to a long call with strike K and underlying asset price S?

a, max(S-K,0)

b, min(S-K,0)

c, max(K-S,0)

d, min(K-S,0)

3, What's the payoff at maturity to a long put with strike K and underlying asset price S?

a, max(K-S,0)

b, max(S-K,0)

c, min(S-K,0)

d, min(K-S,0)