Explanation:

- Option 1: "Who was there" is grammatically correct and sets up a rhetorical or emphatic question.

- Option 2: "but she to look after" has a grammatical error because it lacks a proper verb form. It should be "but she was there to look after" or "but for her to look after."

- Option 3: "the family in distress" is grammatically correct and completes the thought of someone caring for family.

- Option 4: "No error" is incorrect given the issue in Option 2.

The correct answer is Option 2, which contains the error.