Based on the following information, is there an arbitrage opportunity? If yes, what is the arbitrage profit in terms of a percentage?

Bank A: $$1\mathrm{.}6=1$

Bank B: $$1\mathrm{.}8=1$

Select one:

a$.$ Yes, $12\mathrm{.}9\%.$

b$.$ Yes, $12\mathrm{.}5\%.$

c$.$ Yes, $13\mathrm{.}3\%.$

d$.$ No$.$