जलीय पर्यावरण की 'नाड़ी' को – McqOptions

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1.	जलीय पर्यावरण की 'नाड़ी' को मापने के द्वारा पता लगाया जा सकता है
A.	नाइट्रोजन
B.	ऑक्सीजन
C.	क्षारीयता
D.	प्रवाहकत्त्व
Answer» B. ऑक्सीजन

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