Identify the segment in the sentence which contains a grammatical error.
Once upon a time, a beautiful princess has fallen in love with a poor farmer.

Correct option is C

Option (c) "has fallen in love" contains a grammatical error.

• Explanation: The phrase "has fallen in love" is incorrect in the context of "Once upon a time," which indicates a past event. The correct form should be "fell in love," which is the simple past tense used to describe a completed action in the past.

• Correct Sentence: Once upon a time, a beautiful princess fell in love with a poor farmer.

• Grammatical Rule Used: When narrating past events or stories, the simple past tense is typically used to describe actions that have already happened.

• Example: Many years ago, the king fell ill and was confined to his bed.