Ruptured RBCs cannot be trapped at one of the following sites

Options

A. (1) Blood
B. (2) Liver
C. (3) Bone marrow
D. (4) Spleen

Answer

To solve the question regarding where ruptured red blood cells (RBCs) cannot be trapped, we can analyze each option provided:

1. **Blood**: Blood is the medium that carries functional RBCs throughout the body. When RBCs rupture, they are no longer functional and are typically removed from circulation. Therefore, ruptured RBCs cannot be trapped in blood, as blood primarily contains healthy, functional RBCs.

2. **Liver**: The liver plays a role in filtering and processing blood, including the breakdown of old or damaged RBCs. It can trap and process ruptured RBCs, so this option is not correct.

3. **Bone Marrow**: Bone marrow is responsible for the production of new blood cells, including RBCs. It can also deal with the remnants of ruptured RBCs, so this option is not correct.

4. **Spleen**: The spleen is often referred to as the "graveyard" for RBCs. It is known for filtering blood and removing old or damaged RBCs, including ruptured ones. Thus, this option is not correct.

Based on the analysis, the correct answer is that ruptured RBCs cannot be trapped in **blood**.

### Step-by-Step Solution:
1. **Identify the options**: Blood, liver, bone marrow, spleen.
2. **Analyze blood**: Blood contains functional RBCs and does not trap ruptured RBCs.
3. **Analyze liver**: The liver can process and trap ruptured RBCs.
4. **Analyze bone marrow**: Bone marrow can deal with remnants of ruptured RBCs.
5. **Analyze spleen**: The spleen traps and processes ruptured RBCs.
6. **Conclusion**: The only site where ruptured RBCs cannot be trapped is **blood**.