plz answer my question
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option B is correct answer...........
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Option c is correct
Because our body needs more oxygen while doing exercise and oxygen is carried by our blood(opt. B)
And we feel tired because our muscles are working tirelessly (opt.A)
Because our body needs more oxygen while doing exercise and oxygen is carried by our blood(opt. B)
And we feel tired because our muscles are working tirelessly (opt.A)
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