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The puffed up look of dosa and idli dough comes from:
ANitrogen gas
BHydrogen gas
CCarbon dioxide
DOxygen gas
Answer & Solution
Correct answer: C. Carbon dioxide
1. The dough is fermented by bacteria before cooking.
2. A gas is released and trapped in the mixture.
3. That gas is carbon dioxide.
_Source: NCERT Class 12 Biology, Chapter 10, Microbes in Human Welfare._
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