X refers to the phenomenon where Siberian cranes come to India every year from Siberia to escape the severe cold there, whereas Y refers to the phenomenon where earthworm becomes inactive in summer and undergoes a long sleep.
Select the option that correctly identifies X and Y
AX - Hibernation; Y - Aestivation
BX - Mimicry; Y - Migration
CX - Migration; Y - Mimicry
DX - Mimicry; Y - Aestivation