A. respiratory system
B. excretory system
C. Nervous system
D. None of above

A. femur
B. ulna
C. tibia
D. None above

A. cold-blooded
B. warm-blooded
C. non-hearing
D. egg-laying

A. kidneys
B. liver
C. Lungs
D. intestines

A. 1 to 2 liters of saliva per day
B. 1 to 1.5 liters of saliva per day
C. 1.5 to 2 liters of saliva per day
D. None of above

A. A four-chambered heart
B. Hair
C. Warm blood
D. a cerebrum

A. Richter Scale
B. Anemone
C. Seismograph
D. Pyrometer

A. Mad Person
B. Migration of skilled labour to other countries
C. Emigration of intellectuals
D. Illiteracy and ignorance

A. Kidneys
B. Lungs
C. Speen
D. Liver

A. Carbon dioxide
B. Hydrogen
C. Oxygen
D. Nitrogen