Presence of sheathing leaf base and ligule are characteristic of

Options

A. Cycas leaf
B. Fern leaf
C. Banana leaf
D. Grass leaf.

Answer

**Step-by-Step Solution:**

1. **Understanding Key Terms**:
- Begin by defining the terms "sheathing leaf base" and "ligule."
- A sheathing leaf base refers to the part of the leaf that wraps around the stem, creating a sheath.
- A ligule is an outgrowth found at the junction of the leaf sheath and the lamina (the broad part of the leaf).

2. **Analyzing the Options**:
- **Option 1: Psychosleaf**: This type of leaf does not typically exhibit a sheathing base or ligule.
- **Option 2: Fern leaf**: Ferns have a different structure and do not possess a sheathing leaf base or ligule.
- **Option 3: Banana leaf**: While banana leaves are large and have a prominent leaf base, they do not have a ligule.
- **Option 4: Grass leaf**: Grass leaves are characterized by both a sheathing leaf base and the presence of a ligule.

3. **Identifying the Correct Answer**:
- Based on the definitions and analysis of the options, the only type of leaf that possesses both a sheathing leaf base and a ligule is the grass leaf.
- Therefore, the correct answer is **Option 4: Grass leaf**.