A. Self compatibility
B. Interspecific incompatibility
C. Intraspecific incompatibility
The question was asked in semester exam.
This intriguing question originated from Flowering Plants Reproduction in division Sexual Reproduction in Flowering Plants of Biology – Class 12
For explanation I would say: The disadvantage of intraspecific incompatibility also known as self-incompatibility is that it does not allow the production of pure lines. It only promotes cross pollination.