Double fertilisation involves

Options

A. Fertilisation of egg by two gametes
B. Fertilisation of two eggs in the same embryo sac by two sperms brought by one pollen tube
C. Fertilisation of egg and central cell by two sperms brought by different pollen tubes
D. Fertilisation of egg and central cell by two sperms brought by same pollen

Explanation

**Step-by-Step Solution:**

1. **Understanding Double Fertilization:**
- Double fertilization is a unique process that occurs in angiosperms (flowering plants). It involves two fertilization events that take place within the ovule.

2. **Pollen Grain and Male Gametes:**
- A pollen grain contains two male gametes. When it lands on the stigma of a flower, it germinates and forms a pollen tube that grows down into the ovule.

3. **Entering the Embryo Sac:**
- The pollen tube carries both male gametes into the embryo sac, which is located within the ovule.

4. **First Fertilization Event (Syngamy):**
- The first male gamete fuses with the female gamete (egg cell) in a process called syngamy, resulting in the formation of a zygote.

5. **Second Fertilization Event (Triple Fusion):**
- The second male gamete fuses with the two polar nuclei present in the central cell of the embryo sac. This fusion is referred to as triple fusion, resulting in the formation of the primary endosperm cell.

6. **Conclusion:**
- Therefore, double fertilization involves the fertilization of the egg and the central cell by two male gametes (sperms) brought by the same pollen tube.

7. **Correct Option:**
- The correct answer to the question is that double fertilization involves the fertilization of the egg and central cell by two sperms brought by the same pollen tube.

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