Refer to the given figure representing integration of different human systems X, Y and Z. Select the option that correctly identifies these systems.
AX - Digestive system Y - Circulatory system Z - Respiratory system
BX - Respiratory system Y - Circulatory system Z -Digestive system
CX - Circulatory system Y - Digestive system Z -Respiratory system
DX - Digestive system Y - Respiratory system Z -Circulatory system