Rh (-ve) person has

Options

A. Rh antigens on RBC
B. Rh antibodies in Plasma
C. Neither antigens nor antibodies of Rh factor
D. both antigens and antibodies

Answer

To solve the question "Rh (-ve) person has," we need to understand the concepts of Rh antigens and antibodies.

### Step-by-Step Solution:

1. **Understanding Rh Factor**: The Rh factor is a protein that can be present on the surface of red blood cells (RBCs). If a person has this protein, they are considered Rh positive (Rh+). If they do not have this protein, they are considered Rh negative (Rh-).

2. **Identifying Antigens and Antibodies**:
- **Antigens**: These are substances that can trigger an immune response. In the context of the Rh factor, the Rh antigen is what determines if someone is Rh positive or negative.
- **Antibodies**: These are proteins produced by the immune system to neutralize or destroy foreign substances. In the case of blood types, if a person lacks a certain antigen, they will produce antibodies against that antigen.

3. **Analyzing the Options**:
- **Option 1**: R-antigens on RBC - This is incorrect for an Rh negative person, as they do not have Rh antigens.
- **Option 2**: R-antibodies in plasma - This is correct. An Rh negative person will produce antibodies against the Rh antigen if exposed to Rh positive blood.
- **Option 3**: Neither antigens nor antibodies of R-vector - This is incorrect because while they lack Rh antigens, they can have Rh antibodies.
- **Option 4**: Both antigens and antibodies - This is incorrect as Rh negative individuals do not have Rh antigens.

4. **Conclusion**: Based on the analysis, the correct answer is that an Rh negative person has R-antibodies in plasma.

### Final Answer:
An Rh (-ve) person has R-antibodies in plasma.

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