The correct option is B (i)-saltation, (ii)-Hugo de Vries
A species is a group of organisms which have similar characteristics and can interbreed to give rise to fertile offspring.
Speciation is an evolutionary process of the formation of new and distinct species from existing populations by genetic modification.
According to Hugo de Vries, random single and large inheritable mutation in the genetic constitution of the offspring of an organism can lead to the formation of a new species in a single generation. Such mutations are known as saltations.
Natural selection is the process through which nature selects and favours the survival of only those organisms in a population who are better adapted to a changing environment and can give birth to healthy and fertile offspring. This concept was introduced by Darwin.