During 24 hours there is a time when plants neither give\[{{O}_{2}}\]n – McqOptions

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1.	During 24 hours there is a time when plants neither give\[{{O}_{2}}\]nor\[C{{O}_{2}}\]. This is the time of [BHU 1984, 91]
A.	Night
B.	Daylight
C.	Twilight
D.	None of these
Answer» D. None of these

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