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Assertion (A): Accumulation of phenylala...

Assertion (A): Accumulation of phenylalanine in the brain results in mental retardation in Phenylketonuria.
Reason (R ): The affected person lacks phenylalanine which is therefore not converted to tyrosine.

A

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).

B

Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).

C

Assertion (A) is true, but Reason (R) is false.

D

Assertion (A) is false, but Reason (R) is true.

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