Synergids help in

Options

A. Pollen entry into embryosac
B. Endosperm formation
C. Embryosac nutrition
D. Both 1 & 3

Answer

### Step-by-Step Solution:

1. **Understanding the Structure**: The synergids are two specialized cells located at the micropilar end of the mature embryo sac in flowering plants. They are part of the egg apparatus, which also includes the egg cell.

2. **Functions of Synergids**:
- **Protection of the Egg**: Synergids help in protecting the egg cell from potential damage.
- **Shock Absorption**: They act as shock absorbers when the pollen tube penetrates the embryo sac.
- **Guiding Pollen Tube Entry**: Synergids play a crucial role in guiding the entry of the pollen tube into the embryo sac through structures known as the filiform apparatus.

3. **Process of Pollen Tube Entry**: When the pollen tube reaches the embryo sac, it enters through one of the synergids. This process is essential for fertilization, as the pollen tube releases male gametes into the sac.

4. **Eliminating Incorrect Options**:
- **Endosperm Formation**: This is not a function of the synergids; it is performed by the central cell along with the male gamete.
- **Embryo Sac Nutrition**: This is also not a function of the synergids; it is the role of the endosperm.

5. **Conclusion**: Therefore, the primary role of synergids is to facilitate the entry of the pollen tube into the embryo sac, making option one the correct answer.