Assertion :- Both facilitated diffusion and active transport are sensitive to inhibitors.
Reason:- In both type of transportation protein inhibitors leads to inactivation of side chain

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that both facilitated diffusion and active transport are sensitive to inhibitors. This means that the processes of these types of transport can be affected or blocked by certain substances.

2. **Explaining Facilitated Diffusion**: Facilitated diffusion is a type of passive transport that does not require energy. It occurs along the concentration gradient, meaning substances move from an area of higher concentration to an area of lower concentration. This process involves specific protein transporters that facilitate the movement of substances across the cell membrane.

3. **Explaining Active Transport**: Active transport, on the other hand, requires energy to move substances against their concentration gradient (from an area of lower concentration to an area of higher concentration). This process also involves specific proteins, known as carrier proteins, which help in transporting substances across the membrane.

4. **Role of Inhibitors**: Both facilitated diffusion and active transport rely on protein transporters. If inhibitors are introduced, they can bind to these proteins and lead to their inactivation. This means that the transport process would be blocked, as the proteins necessary for transport would no longer function properly.

5. **Conclusion on Assertion and Reason**: Since both the assertion and reason are correct, and the reason provides a valid explanation for the assertion, we conclude that the correct option is that both the assertion and reason are true, and the reason explains the assertion.

### Final Answer:
Both the assertion and reason are correct, and the reason explains the assertion.