Using the Black-Scholes Model,the Delta of a Put Option Is $N(d 1)$

Multiple Choice

Using the Black-Scholes model,the delta of a put option is:

A) $N(d 1)$
B) $N(-d)$
C) $\mathrm{N}(\mathrm{d} 2)$
D) $\mathrm{N}(-\mathrm{d} 2)$