Question:
Which of the following is incorrect?
Which of the following is incorrect?
Show Hint
D antigen present → Rh+ ; absent → Rh−
Updated On: Jul 18, 2026
- Karl Landsteiner and A.S. Weiner discovered Rh antigen
- Rh factor is called D antigen
- Person having D antigen is called Rh−
- Person having D antigen is called Rh+
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The Correct Option is C
Solution and Explanation
Step 1: Understanding Rh blood group system.
The Rh system is based on presence or absence of D antigen on RBC surface. It is important in blood transfusion compatibility.
Step 2: Discovery of Rh antigen.
Karl Landsteiner and A.S. Wiener discovered Rh antigen in blood group studies.
Step 3: Meaning of Rh positive.
If D antigen is present on RBC, the person is called Rh positive (Rh+).
Step 4: Meaning of Rh negative.
If D antigen is absent, the person is called Rh negative (Rh−).
Step 5: Evaluation of statements.
Thus, statement saying D antigen means Rh− is incorrect.
Step 6: Final conclusion.
Therefore, option (3) is incorrect.
The Rh system is based on presence or absence of D antigen on RBC surface. It is important in blood transfusion compatibility.
Step 2: Discovery of Rh antigen.
Karl Landsteiner and A.S. Wiener discovered Rh antigen in blood group studies.
Step 3: Meaning of Rh positive.
If D antigen is present on RBC, the person is called Rh positive (Rh+).
Step 4: Meaning of Rh negative.
If D antigen is absent, the person is called Rh negative (Rh−).
Step 5: Evaluation of statements.
Thus, statement saying D antigen means Rh− is incorrect.
Step 6: Final conclusion.
Therefore, option (3) is incorrect.
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