Match the term to its description.
| Column I | Column II |
|---|---|
| (a) Emasculation | (i) Techniques to overcome self-incompatibility |
| (b) Bagging | (ii) Removal of anthers from a bisexual flower |
| (c) Artificial hybridisation | (iii) Covering the emasculated flower to prevent unwanted pollination |
| (d) Self-incompatibility | (iv) A genetic mechanism to prevent self-pollen from fertilising ovules |