**The correct answer is option B: Embryogenesis**

**Explanation:**

**Pre-fertilization events** refer to the series of processes that occur before the fusion of male and female gametes during sexual reproduction in plants. These events are essential for the successful fertilization and subsequent development of the embryo.

Let's discuss each of the given options and why option B is not a pre-fertilization event:

a) **Gametogenesis**:
- Gametogenesis is the process of formation and development of male and female gametes (sperm and egg cells) in plants.
- In plants, male gametes are produced in the anther through the process of microsporogenesis, which includes the formation of microspore mother cells and their subsequent division to produce microspores.
- Female gametes are produced in the ovule through the process of megasporogenesis, which involves the formation of megaspore mother cells and their subsequent division to produce megaspores.
- Gametogenesis is a crucial pre-fertilization event as it leads to the formation of mature and functional gametes.

b) **Embryogenesis**:
- Embryogenesis is the process of development and formation of an embryo from the fertilized egg (zygote).
- It occurs after fertilization and involves the division and differentiation of cells to form the embryonic structures.
- Therefore, embryogenesis is a post-fertilization event and not a pre-fertilization event. This is why option B is the correct answer.

c) **Gamete Transfer**:
- Gamete transfer refers to the transfer of male gametes (pollen grains) from the anther to the female reproductive organ (pistil).
- In plants, this transfer can occur through various means, such as wind, water, insects, or other pollinators.
- Gamete transfer is an essential pre-fertilization event as it brings the male gametes in close proximity to the female reproductive organ for potential fertilization.

d) **Pollen-pistil interaction**:
- Pollen-pistil interaction refers to the physical and biochemical interactions that occur between the pollen grains and the pistil (female reproductive organ).
- These interactions are important for successful pollen germination, pollen tube growth, and eventual fertilization.
- Pollen-pistil interaction is a crucial pre-fertilization event as it allows for the recognition and acceptance of compatible pollen grains by the pistil.

In summary, the correct answer is option B: Embryogenesis, as it is a post-fertilization event and not a pre-fertilization event.

Embryogenesis is a post fertilisation event.