Assertion :Flagellated protozoans contain a kinetoplast. Reason: Trypanosoma is a vertebrate flagellated blood parasite. It's different species cause sleeping sickness and chagas disease in human and nagana in domesticated cattle.

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.
Flagellated protozoans contain a large circular DNA in mitochondria called Kinetoplast. Trypanosoma is a vertebrate, flagellated protozoans. The parasite is transmitted by blood-sucking organisms(sand fly, tse tse fly). The parasite does not affect fly. Different species of Trypanosoma cause different diseases in human and animals. Thus, the correct option is B.

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