Match List-I with List-II:
| List-I (Biomedical techniques) | List-II (Features) |
|---|---|
| A. Computed tomography | 1. A piece of the suspected tissue is cut into thin sections, stained and examined under microscope |
| B. Blood and bone marrow tests | 2. X-rays are used to detect cancers of the internal organs |
| C. Radiography | 3. Detect increased cell counts in leukaemias |
| D. Biopsy | 4. Uses X-rays to generate a three-dimensional image of the internals of an object |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → A-4, B-3, C-2, D-1
(A) Computed tomography — this matches (4) Uses X-rays to generate a three-dimensional image of the internals of an object. CT also uses X-rays, but it builds a three-dimensional image, which plain radiography does not.
(B) Blood and bone marrow tests — this matches (3) Detect increased cell counts in leukaemias. In leukaemia (blood cancer) the cell count rises, and these tests pick it up.
(C) Radiography — this matches (2) X-rays are used to detect cancers of the internal organs. Radiography is the use of X-rays, and it helps to detect cancers of internal organs.
(D) Biopsy — this matches (1) A piece of the suspected tissue is cut into thin sections, stained and examined under microscope. The pathologist studies these sections (histopathological studies) to confirm cancer.
NCERT Extract:
Cancer – “… Cancer detection is based on biopsy and histopathological studies of the tissue and blood and bone marrow tests for increased cell counts in the case of leukemias. In biopsy, a piece of the suspected tissue cut into thin sections is stained and examined under microscope (histopathological studies) by a pathologist. 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. Computed tomography uses X-rays to generate a three-dimensional image of the internals of an object.”