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Typhoid-causing bacteria entering through the mouth stay in the:
ALung sacs
BLiver lobe
CBrain stem
DGut lining
Answer & Solution
Correct answer: D. Gut lining
1. Entry point shapes the target organ.
2. Typhoid bacteria stay in the gut lining.
3. TB bacteria from the nose go to the lungs.
_Source: NCERT Class 9 Science, Chapter 13, Why Do We Fall Ill._
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