If $$\cos x = \sin y$$ and $$\cot (x - 40^\circ) = \tan (50^\circ - y)$$, then the values of x and y are

A

$$70^\circ, 20^\circ$$

B

$$85^\circ, 5^\circ$$

C

$$80^\circ, 10^\circ$$

D

$$60^\circ, 30^\circ$$