Transfer of pollen grains from anther to the stigma of another flower of the same plant is:

Geitonogamy

The correct answer is Option (2) → Geitonogamy

Geitonogamy: Geitonogamy involves the transfer of pollen grains from the anther to the stigma of another flower of the same plant. While functionally it is a form of cross-pollination since it involves a pollinating agent, genetically it is similar to autogamy because the pollen grains come from the same plant. Geitonogamy does not introduce genetically different pollen to the stigma.

Chasmogamous flowers which are similar to flowers of other species with exposed anthers and stigma. Chasmogamy is the type of plant reproduction in which the flowers open up, enabling cross-pollination.

Xenogamy: Transfer of pollen grains from anther to the stigma of a different plant .This is the only type of pollination which during pollination brings genetically different types of pollen grains to the stigma.

In genetics, hybridization refers to the process of crossing two genetically different individuals to produce a hybrid, which is an offspring with a mix of traits from both parents. This is often done to combine desirable traits from both parent organisms, such as disease resistance from one and high yield from another.