जॉइन Examsbookउत्तर : 4. "carbon dioxide"
It is not advisable to sleep under a tree at night because of release of5
प्र: It is not advisable to sleep under a tree at night because of release of
- 1oxygen in a lesser quantity than the required levelsfalse
- 2oxygen in large amountsfalse
- 3carbon monoxidefalse
- 4carbon dioxidetrue
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उत्तर : 4. "carbon dioxide"
व्याख्या :
Answer: D) carbon dioxide Explanation:

