నీటిలో ఆక్సిజన్ శాతం ఎంత ఉ – McqOptions

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1.	నీటిలో ఆక్సిజన్ శాతం ఎంత ఉంటుంది ?
A.	0.23
B.	0.36
C.	0.89
D.	0.78
Answer» D. 0.78

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