Which one of the following generates new genetic combinations leading to variation?

Sexual reproduction leads to genetic recombination and brings about variations in the offspring.

(1), (2), (4) Vegetative reproduction, asexual reproduction, parthenogenesis and nucellar polyembryony form offspring
that look like their parents in all aspects, as there is no gametic union and only one parent is involved, which does not bring about variations. Such offspring of a single parent, formed by vegetative or asexual reproduction, is called a clone.