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Please find below the answer:

The correct option is (D).
Red muscle fibres contain a pigment called myoglobin. Myoglobin is a red-coloured oxygen-storing pigment. It receives oxygen from the red blood cells and transports it to the mitochondria of muscle cells, where the oxygen is used in cellular respiration to produce energy. Hence red muscles are also called aerobic muscles. They have plenty of mitochondria.

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