The given sentence contains errors, thus: b) No, there is an error.
How to explain
The verb tense in a sentence should be consistent. In this sentence, the verb "chased" is in the past tense, indicating that the action of chasing happened in the past.
However, the verb "eat" is in the present tense, indicating that the action of eating is happening now. This inconsistency in verb tense makes the sentence grammatically incorrect.
To correct the sentence, we should change the verb "eat" to the past tense verb "ate". This will make the sentence grammatically consistent and accurate:
The cat chased the mouse up the tree and ate it.
The Complete Question
Is the following sentence grammatically correct: "The cat chased the mouse up the tree and eat it."?