What is the forward rate if the value of a European call for 1 with strike price X = 1.8 $/ is 0.1$ and the value of a European put for 1 with strike price X = 1.8 $/ is 0.1$.

a) 1.6$/

b) 1.7 $/

c) 1.8 $/

d) 1.9 $/

e) 2.0 $/

f) 3.6 $/