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Question

The model answer given is (4). Would appreciate if someone could explain why the answer is 4 as we do not understand. Thanks.

Answer

Updated.

Sorry, I missed the words “six hours after meal”. If most¬†food is digested after 6 hours, blood flowing out will have less¬†digested food and less oxygen. Only choice (d), but I also think it should be more carbon dioxide. So still better to check with school teacher.

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Thanks for your reply.

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