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Leukaemia, a type of cancer, is characterised by an increased formation of:
ARed blood cells in the bone marrow only
BEpithelial cells of the skin and lungs
CConnective tissue cells of bones and cartilage
DWhite blood cells in bone marrow and lymph nodes
Answer & Solution
Correct answer: D. White blood cells in bone marrow and lymph nodes
1. Leukaemia is called blood cancer.
2. It involves an increase in white blood cells produced in the bone marrow and lymph nodes.
3. Red blood cells are not the cells that increase, so option A is a trap; epithelial and connective tissue cancers are carcinoma and sarcoma instead.
4. Hence the answer is D.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit "Health and Diseases", p.316_
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