Assertion :Chordates have a oxygen carrying pigment, called as hemoglobin. It is always present in red blood corpuscles. Reason: Non-chordates require very little oxygen as compared to chordates for their body functions.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Assertion is incorrect but Reason is correct.

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
Chordates have oxygen carrying pigment, known as heamoglobin. It is present in RBCs and helps in supplying of oxygen to tissues.
Non-chordates requires very less oxygen as their body is very small and they have several other respiratory organs, like tracheal tubes etc. The oxygen carrying pigment is usually absent and even if it is present, it is present in plasma.
Hence, correct answer is option B.

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