|(i) Cancer detection is based on biospy and histophathological studies of the tissue, and blood and bone marrow tests for increased cell counts in case of leukaemia|
|(ii) In biopsy, a piece of the suspected tissue cut into thin sections is stained and examined under microscope by a pathologist|
|(iii) Techniques like radiography (use of X-rays), CT (computed tomography) and MRI (magnetic resonance imaging) are very useful to detect cancers of the internal organs.|
|(iv) Computed tomography uses strong magnetic fields and non-ionising radiations to detect physiological changes in living tissues.|
|(v) MRI uses X-rays and ionising radiation to generate a 3-D image of the internal structure of an object.|
|Which of the above statements are incorrect?|
A) (i) and (iii)
B) (ii) and (iv)
C) (iii) and (iv)
D) (iv) and (v)
Correct Answer: D
Solution :Computed tomography uses X-rays to generate a three-dimensional image of the internal structure of an object. MRI uses strong magnetic fields and non-ionising radiations to accurately detect pathological and physiological changes in the living tissues.
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