Which blood group is known as the universal donor?
Difficulty: Medium
About this MCQ
This Medium Everyday Science MCQ checks one syllabus fact. Candidates use it for NTS GAT General, PPSC Lecturer practice.
The question is: “Which blood group is known as the universal donor?”
The accepted answer is D. O−. O negative blood lacks A, B, and Rh antigens, so it can generally be transfused to patients of any ABO/Rh type in emergencies — hence \"universal donor\".
- A. A+
Why not A: A+ can donate to A+ and AB+ only (simplified ABO/Rh rules).
- B. B+
Why not B: B+ is not a universal donor.
- C. AB+
Why not C: AB+ is the universal recipient, not donor.
- D. O− ✓
Correct answer
D. O−
Explanation
O negative blood lacks A, B, and Rh antigens, so it can generally be transfused to patients of any ABO/Rh type in emergencies — hence \"universal donor\".
Source: Human physiology / transfusion medicine basics
Tags: Biology, Human Body
Relevant exams: NTS GAT General, PPSC Lecturer
Submitted by: MCQsHub Editorial
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