if 'CLOUD' is call 'WHITE' 'WHITE' is called 'RAIN' 'RAIN' is called 'GREEN' 'GREEN' is called 'SKY' 'SKY' is called 'BLUE' and 'BLUE' is called 'WATER', where will the birds fly?

AIR CLOUD WHITE BLUE

BLUE

The birds fly in the sky. According to the question, sky is called blue. Thus, the correct answer is "Blue"