To which of the following parts of a flower, the proximal end of the filament of stamen is attached?

Options

A. Pedicel or tepals
B. Thalamus or petal
C. Sepals or petals
D. Tepals or sepals

Answer

To solve the question regarding the attachment of the proximal end of the filament of the stamen in a flower, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Parts of the Flower**:
- The filament is part of the stamen, which is the male reproductive organ of the flower.
- The proximal end of the filament is the end that is closest to the flower's center.

2. **Identifying the Options**:
- The options given are:
1. Pedicel or tepal
2. Thalamus or petal
3. Sepals or petal
4. Tepal or sepals

3. **Analyzing Each Option**:
- **Option 1 (Pedicel or tepal)**: The pedicel is the stalk that supports the flower, and tepal refers to the parts of the flower that are not differentiated into sepals and petals. This is not where the filament attaches.
- **Option 2 (Thalamus or petal)**: The thalamus (or receptacle) is the thickened part of the stem where the flower parts are attached. The filament of the stamen attaches to the thalamus.
- **Option 3 (Sepals or petal)**: Sepals are the outer parts of the flower that protect the bud. The filament does not attach here.
- **Option 4 (Tepal or sepals)**: As mentioned, tepal refers to non-differentiated flower parts, and sepals are protective. Neither is the attachment point for the filament.

4. **Conclusion**:
- The correct answer is **Option 2: Thalamus or petal**. The proximal end of the filament of the stamen is attached to the thalamus.

### Final Answer:
The proximal end of the filament of the stamen is attached to the **thalamus**.