Among the following, the correct options for pre- fertilization events are:
(a.) Gametogenesis
(b.) Gametes transfer
(c.) Growth of pollen tube
(d.) Syngamy
(e.) Embryogenesis

Options

A. `c, d & e`
B. `a, b & c`
C. `b, c & d`
D. `a, b & d`

Answer

To solve the question regarding the correct options for pre-fertilization events, we will analyze each of the provided terms step by step.

### Step 1: Understand Gametogenesis
- **Definition**: Gametogenesis is the process by which haploid gametes are formed from diploid cells through meiosis.
- **Conclusion**: Since gametogenesis occurs before fertilization, it is a pre-fertilization event.

### Step 2: Analyze Gamete Transfer
- **Definition**: Gamete transfer refers to the transfer of pollen grains from the anther (male part) to the stigma (female part) of a flower, commonly known as pollination.
- **Conclusion**: This process is essential for fertilization and occurs before the actual fusion of gametes, making it a pre-fertilization event.

### Step 3: Examine Growth of Pollen Tube
- **Definition**: After pollination, the pollen grain germinates on the stigma and grows a pollen tube down to the ovary, where the ovules are located.
- **Conclusion**: The growth of the pollen tube is necessary for the sperm cells to reach the egg cell for fertilization, thus it is also a pre-fertilization event.

### Step 4: Consider Syngamy
- **Definition**: Syngamy is the process of fusion of male and female gametes, resulting in the formation of a zygote.
- **Conclusion**: Since syngamy is the actual process of fertilization, it is not a pre-fertilization event.

### Step 5: Look at Embryogenesis
- **Definition**: Embryogenesis is the process that occurs after fertilization, where the zygote develops into an embryo through cell division.
- **Conclusion**: As embryogenesis occurs after fertilization, it is not a pre-fertilization event.

### Final Conclusion
Based on the analysis:
- The correct pre-fertilization events are:
- (a) Gametogenesis
- (b) Gamete transfer
- (c) Growth of pollen tube

Therefore, the correct option is **A, B, and C**.