A. locating and diagnosing muscle and nerve abnormalities
B. recording of electric potential changes at each heart beat
C. measuring electricity
D. generating statistcal electricity by induction.

A. on freezing, the resulting ice becomes harder
B. it expands in volume considerably
C. there is a difference of temperature within and outside the pipe
D. the air trapped in the pipe exerts its pressure to burst the pipe.

A. carbohydrates
B. proteins
C. vitamin B
D. vitamins A and C

A. It is the pressure that the blood clot exerts over the brain
B. It is the pressure that blood receives on account of faulty commands from the brain
C. It is the pressure that fatness or old age exerts on the body’s circulatory system
D. It is the amount of pressure on the blood as a result of the heart’s pumping function and the resistance of the arterial walls

A. give rest to the tired eyes
B. give lubrication to the eyes
C. prevent dust from entering the eyes
D. perform an act of habit only

A. 10,000 times
B. 16,000 times
C. 22,000 times
D. 84,000 times

A. any reaction
B. fission
C. fusion
D. either fission or fusion

A. copper
B. silver
C. gold
D. lead

A. of a special clay used in making it
B. clay heats up slowly as also loses coolness slowly
C. pitcher’s porous build promotes evaporation and consequent cooling
D. pot water does not come into contact with outside heat

A. the sphere or field of photography
B. normal range of photography
C. the 500-mile deep bright surface of sun
D. the upper layer of the earth crust