In the treatment of which disease is dialysis used
(A) Ulcers
(B) Heart failure
(C) Kidney failure
(D) Brain tumour
What is the range, in hertz, of the normal human hearing
(A) 10 Hz to 10 kHz
(B) 20 Hz to 20 kHz
(C) 2000Hz
(D) 40 Hz to 40 kHz
Which of the following is caused by a deficiency of iron in the diet
(A) Giotre
(B) Scurvy
(C) Anaemia
(D) Rickets
Which of the following gases do plants and trees give out during photosynthesis
(A) Hydrogen
(B) Nitrogen
(C) Oxygen
(D) Carbon dioxide