Non professional antigen presenting cell is A/E ?
**Core Concept**
The question tests the understanding of antigen-presenting cells (APCs), which are crucial for initiating the immune response. **Antigen presentation** is a process where APCs display antigenic peptides on their surface using **MHC molecules**. Non-professional APCs are cells that can present antigens but are not dedicated to this function like professional APCs.
**Why the Correct Answer is Right**
Non-professional APCs include various cell types that can express **MHC class II** molecules under certain conditions, allowing them to present antigens to T-cells. This capability is not their primary function but can be induced, especially during inflammation or infection.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it is not provided.
**Option B:** Incorrect because it is not provided.
**Option C:** Incorrect because it is not provided.
**Option D:** Incorrect because it is not provided.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that while non-professional APCs can present antigens, their ability to activate naive T-cells is generally less efficient compared to professional APCs like **dendritic cells** and **macrophages**.
**Correct Answer:** Not provided due to missing options.