AIIMS 2018 Zoology Biology MCQ Question

The statement "Mitochondria are absent in RBC" (A) is true because red blood cells (RBCs) lack mitochondria, which is necessary for aerobic respiration. However, the reason provided, "RBC form ATP by glycolysis" (R), is also true, but glycolysis occurs in the cytoplasm and does not rely on mitochondria, so it does not explain the absence of mitochondria. Therefore, both A and R are true, but R does not correctly explain A, making the correct answer B.