(c) Neo-Darwinsim has emerged out as the 'modern synthetic theory of evolution. It designated by Huxley $(1942).$
Dobzhansky's $(1937) $ book "Genetics and the origin of species" provided the initial basis of this theory and Muller $ (1949)$, Fisher $(1958),$ Wright $(1968)$, Mayr $(1963, 70) $ Stebbins $(1966-76) $ etc. helped significantly in its formulation.