प्रयोग एवं अनुप्रयोग सिद्धान्त (use and disuse theory) प्रस्तावित किया गया : (A) Lamarck द्वारा ...

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प्रयोग एवं अनुप्रयोग सिद्धान्त (use and disuse theory) प्रस्तावित किया गया :
(A) Lamarck द्वारा
(B) Darwin द्वारा
(C) Hugo de Vries द्वारा
(D) Malthus द्वारा
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