सर्वप्रथम पारस्थितिक तंत� – McqOptions

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1.	सर्वप्रथम पारस्थितिक तंत्र शब्द का प्रयोग किया -
A.	ए.जी.टेन्सले
B.	वोर
C.	जे.जे.थॉमसन
D.	न्यूटन
Answer» B. वोर

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