पृथ्वी पर अधिकांश ऑक्सीजन – McqOptions

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1.	पृथ्वी पर अधिकांश ऑक्सीजन उत्पादित होती है -
A.	घास से
B.	शैवालों से
C.	वृक्षों से
D.	धान के खेतों से
Answer» C. वृक्षों से

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