Question

degrees of comparison Jhon is more intellegent than Sara

Answer 1

it is comparative degree

Answer 2

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Your Sentence is in Comparative Degree.

C.D. - John is more intelligent than sara.

S.D. - S.D. in not possible because it has two persons.
And if there are two persons in a sentence , we can't change that into Superlative Degree.

P.D. - Sara is not as intelligent as John.

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