Change in frequency of alleles in population results in evolution as proposed by

The correct option is B Hardy-Weinberg principle
Hugo De Vries gave the mutation theory of evolution.

Hardy-Weinberg principle states that the allele frequencies remain constant in successive generations in a population which does not undergo evolutionary change.

Darwin gave the theory of natural selection.

Lamarck gave the theory of inheritance of acquired characters.

Hence the correct option is
b. Hardy-Weinberg principle