Question:medium
Identify the blood grouping process done here. The slide shows the test cells with anti-D reagent and a control. Which blood group does this signify?
Identify the blood grouping process done here. The slide shows the test cells with anti-D reagent and a control. Which blood group does this signify?
Show Hint
A reaction read against Anti-D reagent tells you the D antigen status, not the ABO type.
Updated On: Jun 23, 2026
- A-ve
- B+ve
- O+ve
- Rh group
Show Solution
The Correct Option is D
Solution and Explanation
Step 1: Focus on the reagent in use. A single Anti-D reagent applied to the patient cells is the hallmark of Rh typing, so the process being shown is Rh (D) grouping.
Step 2: Read the agglutination pattern. Clumping with Anti-D means the cell carries the D antigen and is labelled D positive; a smooth, clump-free reaction means the D antigen is absent and the cell is D negative.
Step 3: Recall that anti-D is not a naturally occurring antibody. Sensitisation happens through pregnancy or transfusion, which is why D status is critical in obstetrics and transfusion practice.
Step 4: The choices naming specific ABO types with signs are distractors, because they would require anti-A and anti-B reagents. The image only tests for the Rh group.
$Anti\text{-}D + cells \rightarrow agglutination = D\ positive$
\[\boxed{Rh\ group}\]
Step 2: Read the agglutination pattern. Clumping with Anti-D means the cell carries the D antigen and is labelled D positive; a smooth, clump-free reaction means the D antigen is absent and the cell is D negative.
Step 3: Recall that anti-D is not a naturally occurring antibody. Sensitisation happens through pregnancy or transfusion, which is why D status is critical in obstetrics and transfusion practice.
Step 4: The choices naming specific ABO types with signs are distractors, because they would require anti-A and anti-B reagents. The image only tests for the Rh group.
$Anti\text{-}D + cells \rightarrow agglutination = D\ positive$
\[\boxed{Rh\ group}\]
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