What is triple fusion? Where and how does it take place? Name the nuclei involved in triple fusion.

Explanation

### Step-by-Step Solution:

1. **Definition of Triple Fusion**:
- Triple fusion is a process in flowering plants where one male gamete nucleus fuses with two polar nuclei. This results in the fusion of three nuclei, hence the term "triple fusion."

2. **Location of Triple Fusion**:
- Triple fusion occurs in the embryo sac of flowering plants. The embryo sac is the female gametophyte that contains the egg cell and polar nuclei.

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