which sentence has correct pronoun and antecedent agreement

The sentence "Sara went to the concert by herself" has correct pronoun and antecedent agreement.

A correct example of pronoun and antecedent agreement in a sentence is:

"John went to the store, and he bought some groceries."

In this sentence, "John" is the antecedent and the pronoun "he" agrees in both gender and number with the noun it is referring to.

To find a sentence with correct pronoun and antecedent agreement, we need to look for a sentence where the pronoun correctly matches the antecedent in terms of number, gender, and person. Let's consider the following sentences:

1. The students studied hard, and they earned good grades. (Correct)

In this sentence, the pronoun "they" correctly agrees with its antecedent "students" in terms of number (plural).

2. The student studied hard, and he earned good grades. (Correct)

Here, the pronoun "he" agrees with its antecedent "student" in terms of number (singular), gender (masculine), and person (third person).

3. The student studied hard, and they earned good grades. (Incorrect)

In this sentence, the pronoun "they" does not agree with its antecedent "student" in terms of number (singular).

Therefore, example 1 and 2 demonstrate correct pronoun and antecedent agreement.