A convertible bond has a par value of $$1,000$ and a current market value of $$850.$ The current price of the issuing firm's stock is $$27,$ and the conversion ratio is $30$ shares. The bond's conversion premium is

a$.$ $$40.$

b$.$ $$150.$

c$.$ $$190.$

d$.$ $$200.$

e$.$ None of the options are correct.