What does the filiform apparatus do at the entrance into or Function of filiform apparatus is to
(a) Brings about opening of pollen tube
(b) Guides pollen tube from synergid to egg
(c) Helps in the entry of pollen tube into synergid
(d) Prevents entry of more than one pollen tube into embryo sac

Options

A. Brings about opening of pollen tube
B. Guides pollen tube form synergid to egg
C. Helps in the entry of pollen tube into synergid
D. Prevents entry of more than one pollen tube into embryo sac.

Answer

To solve the question regarding the function of the filiform apparatus, we will analyze each option provided and determine which one accurately describes its role.

### Step-by-Step Solution:

1. **Understanding the Filiform Apparatus**: The filiform apparatus consists of specialized cells called synergids, which are located at the entrance of the embryo sac in flowering plants. Their primary role is to facilitate the process of fertilization.

2. **Analyzing the Options**:
- **(a) Brings about opening of pollen tube**: This option suggests that the filiform apparatus opens the pollen tube. However, the opening of the pollen tube is primarily a function of the pollen grain itself and not directly caused by the filiform apparatus.
- **(b) Guides pollen tube from synergid to egg**: This option implies that the filiform apparatus guides the pollen tube after it has entered the synergid. However, the filiform apparatus does not guide the pollen tube to the egg; it primarily aids in the entry of the pollen tube into the synergid.
- **(c) Helps in the entry of pollen tube into synergid**: This option correctly identifies the primary function of the filiform apparatus. It helps facilitate the entry of the pollen tube into the synergid, allowing the male gametes to be released into the embryo sac.
- **(d) Prevents entry of more than one pollen tube into embryo sac**: While the filiform apparatus does play a role in ensuring that typically only one pollen tube enters the embryo sac, its main function is not to prevent multiple entries but to assist in the entry of the pollen tube.

3. **Conclusion**: Based on the analysis, the correct answer is **(c) Helps in the entry of pollen tube into synergid**. This option accurately reflects the primary function of the filiform apparatus.

### Final Answer:
(c) Helps in the entry of pollen tube into synergid.

---