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Everyday Science Medium PPSC Uploaded: 01 Sep 2026

Which of the following organs is responsible for producing red blood cells in adults?

  • A Liver
  • B Bone marrow
  • C Spleen
  • D Heart
Correct Answer: Option B — Bone marrow
Explanation:
In adults, red blood cell production primarily occurs in the bone marrow of certain bones, such as the pelvis, ribs, and vertebrae.
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