तत्वो का सबसे पहले वर्गीकर – McqOptions

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1.	तत्वो का सबसे पहले वर्गीकरण किसने किया था -
A.	लोथर मेयर
B.	न्यूलैंडस
C.	मेंडेलीफ
D.	डोबेरेनर
Answer» E.

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