Assertion :'Flatworms' belong to platyhelminthes. Reason: Flatworms are so named because of their shape.

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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Both assertion and reason are incorrect.

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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.
Platyhelminthes are also known as flatworms as they have a flat body without any external or internal grooves. They are devoid of internal segmentation. They are bilaterally symmetrical.
So, the correct answer is option B.

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ASSERTION: n-Pentane and n-Hexane belong to a homologous series.

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Reason (R) We cannot determine order from balanced chemical equation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
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(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

Assertion (A) Rate constant determined from Arrhenius equation are fairly accurate for simple as well as complex molecules.

Reason (R) Reactant molecules undergo chemical change irrespective of their orientation during collision.

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