Endocytosis includes -

Options

A. Phagocytosis
B. Pinocytosis
C. Both
D. None

Answer

### Step-by-Step Solution:

1. **Understanding Endocytosis**:
- Endocytosis is a cellular process where substances are brought into the cell. This process involves the engulfing of materials by the cell membrane, which then forms a vesicle to transport the material inside the cell.

2. **Identifying Types of Endocytosis**:
- There are two main types of endocytosis:
- **Phagocytosis**: This is often referred to as "cell eating." In this process, the cell engulfs solid particles, such as food or pathogens, by extending its membrane around the particle and forming a vesicle.
- **Pinocytosis**: Known as "cell drinking," this process involves the uptake of liquid substances. The cell membrane invaginates to form a pocket that takes in extracellular fluid and dissolved substances.

3. **Evaluating the Options**:
- **Option 1: Phagocytosis** - This is a type of endocytosis, so it is correct.
- **Option 2: Pinocytosis** - This is also a type of endocytosis, so it is correct.
- **Option 3: Both Phagocytosis and Pinocytosis** - Since both are types of endocytosis, this option is correct.
- **Option 4: None** - This option is incorrect because we have identified valid types of endocytosis.

4. **Conclusion**:
- The correct answer includes both phagocytosis and pinocytosis, which are the two main types of endocytosis.

### Final Answer:
Endocytosis includes **Phagocytosis** and **Pinocytosis**.