Assertion :
MRI is superior to PET.
Reason: PET is used only in case of infectious diseases.

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 C Assertion is correct but Reason is incorrect

MRI means magnetic resonance imaging and PET stands for positron emission tomography. MRI is superior to PET because:
(i) No ionising radiations are employed.
(ii) MRI gives two and three-dimensional pictures.
(iii) Images can be obtained from any plane.
(iv) It provides better information about cancers, tumours and infections. PET allows a physician to examine the heart, brain and other organs. PET images show the chemical functioning of an organ or tissue.
So, the correct answer is 'Assertion is correct but Reason is incorrect'.

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