Biosensor is used to measure?

A. Blood glucose level
B. The body pH value
C. Amount of hemoglobin
D. Salinity in Urine

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According to Big Bang Theory, the Universe began about _____ billion years ago.

A. 10 – 20
B. 20 – 30
C. 30 – 40
D. 40 – 50

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The bodyguard of the Earth is ____ that save the Earth from many Comets and Asteroids.

A. Mars
B. Saturn
C. Uranus
D. Jupiter

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