Which is basis of evolution

In Hardy­Weinberg equation, the frequency of heterozygous individual is represented by

Factor affecting the Hardy-Weinberg principlesare

$(I)$ Gene flow ;

$(II)$ Genetic drift

$(III)$ Mutation

$(IV)$ Genetic recombination

$(V)$ Natural selection

The correct combination is

Darwin's theory of natural selection to explain organic evolution was based on

In a population of $1000$ individuals $360$ belong to genotype $AA, 480$ to Aa and the remaining $160$ to $aa$. Based on this data, the frequency of allele $A$ in the population is

In Hardy-Weinberg principle expression of allele frequency is represented by