Triploid tissue is

Options

A. Endosperm in Maize/Wheat/Lily
B. Leaf in Onion/Bryophyllum/Pinus
C. Root in Onion/Radish/Carrot
D. Ferm prothallus.

Answer

### Step-by-Step Solution:

1. **Understanding Triploid Tissue**:
- Triploid tissue refers to a type of tissue that has three sets of chromosomes (3n). This is important in the context of plant biology, particularly in the development of certain tissues during fertilization.

2. **Identifying Options**:
- The options given are:
- Option 1: Endosperm
- Option 2: Leaf
- Option 3: Root
- Option 4: Prothalus (F1)

3. **Analyzing Each Option**:
- **Option 1: Endosperm**:
- The endosperm is formed during fertilization when one male gamete fuses with two polar nuclei (which are 2n). This results in a triploid nucleus (3n), making the endosperm a triploid tissue.

- **Option 2: Leaf**:
- Leaves are part of the plant's vegetative structure and are diploid (2n) because they arise from the zygote and are part of the plant body.

- **Option 3: Root**:
- Similar to leaves, roots are also diploid (2n) as they develop from the zygote and contribute to the plant's structure.

- **Option 4: Prothalus (F1)**:
- Prothalus is a gametophyte stage in certain plants and is typically haploid (n), not triploid.

4. **Conclusion**:
- Based on the analysis, the only option that represents triploid tissue is **Option 1: Endosperm**.

### Final Answer:
- The correct answer is **Endosperm**.

---