Correct Answer - Option 2 : K C G M R
Checking options one by one:
1) G R R C M / G K R C R / G K G C M → doesn't follow a pattern
2) G K R C M / G K R C M / G K R C M → follow a pattern
3) G K R G M / G K R C R / G K M C M → doesn't follow a pattern
4) G K R C M / C K R C M / G K G C M → doesn't follow a pattern
Hence, "K C G M R" is the correct answer.