In human digestion is
(a) Intercellular
(b) Intracellular
(c) Extracellular
(d) Both a and b

Options

A. Intercelluar
B. Intracelluar
C. Extracelluar
D. Both A and B

Answer

To determine the type of digestion that occurs in humans, we need to analyze the options provided:

1. **Understanding Digestion Types**:
- **Intracellular Digestion**: This type of digestion occurs within the cells. It involves the engulfing of food particles by the cell, which are then broken down inside food vacuoles. This method is less efficient and is typically found in simpler organisms like protozoans and sponges.
- **Extracellular Digestion**: This type of digestion occurs outside the cells, typically in a digestive cavity or canal. In humans, this process takes place in the alimentary canal, where food is broken down by enzymes and absorbed.

2. **Evaluating the Options**:
- **Option (a) Intercellular**: This option refers to digestion occurring between cells, which is not applicable to human digestion.
- **Option (b) Intracellular**: As mentioned, this type of digestion occurs within cells and is not the primary method of digestion in humans.
- **Option (c) Extracellular**: This is the correct answer, as humans primarily digest food outside their cells in the alimentary canal.
- **Option (d) Both a and b**: Since both options (a) and (b) are incorrect, this option is also incorrect.

3. **Conclusion**: Based on the analysis, the correct answer is **(c) Extracellular**.

### Step-by-Step Solution:
1. Identify the types of digestion: intracellular and extracellular.
2. Understand that intracellular digestion occurs within cells and is less efficient, found in lower organisms.
3. Recognize that extracellular digestion occurs outside the cells in a digestive canal, which is how humans digest food.
4. Evaluate the options:
- (a) Incorrect.
- (b) Incorrect.
- (c) Correct.
- (d) Incorrect.
5. Conclude that the correct answer is (c) Extracellular.