The given assertion and reason are incorrect.

Assertion: Rhizomes, tubers, and corms are excellent methods of sexual reproduction. Reason: Autogamy is the transfer of pollen from the anther of one flower to the stigma of another.

The assertion is incorrect because rhizomes, tubers, and corms are not methods of sexual reproduction. They are actually structures involved in asexual reproduction in plants.

Rhizomes are underground stems that can give rise to new shoots and roots, allowing for vegetative propagation. Tubers, such as those found in potatoes, are swollen underground stems that store nutrients and can produce new plants through budding. Corms are also underground stems that serve as nutrient storage organs and can generate new plants through budding as well.

The reason provided is unrelated to the assertion and is also incorrect. Autogamy refers to self-pollination within the same flower, not the transfer of pollen from one flower to another.

In summary, the assertion is incorrect because rhizomes, tubers, and corms are not methods of sexual reproduction, but rather asexual reproductive structures. The reason provided is unrelated to the assertion and also incorrect.