Let $$Z_k = \cos \left(\frac{2k\pi}{10}\right) + i \sin \left(\frac{2k\pi}{10}\right); k = 1, 2 , ..., 9.$$

A

P - 1, Q - 2, R - 4, S - 3

B

P - 2, Q - 1, R - 3, S - 4

C

P - 1, Q - 2, R - 3, S - 4

D

P - 2, Q - 1, R - 4, S - 3