My uncle forced (1)/ my friend and I (2)/ to stay back. (3)/ No error (4)

Explanation

To solve the question, we need to analyze the sentence provided and identify any grammatical errors. The sentence is:

"My uncle forced (1)/ my friend and I (2)/ to stay back. (3)/ No error (4)"

### Step-by-Step Solution:

1. **Identify the Parts of the Sentence**: The sentence is divided into four parts:
- Part 1: "My uncle forced"
- Part 2: "my friend and I"
- Part 3: "to stay back"
- Part 4: "No error"

2. **Analyze Each Part**:
- **Part 1**: "My uncle forced" - This part is grammatically correct as it has a subject ("My uncle") and a verb ("forced").
- **Part 2**: "my friend and I" - This part contains an error. In this context, "I" should be replaced with "me." The phrase should read "my friend and me" because "me" is the object of the verb "forced."
- **Part 3**: "to stay back" - This part is also correct as it follows the verb and indicates what the action is about.
- **Part 4**: "No error" - This option is incorrect since we have identified an error in Part 2.

3. **Conclusion**: The error lies in Part 2 of the sentence. Therefore, the correct identification of the error is:
- **Error in Part 2**: "my friend and I" should be "my friend and me."

### Final Answer:
The error is in part 2. The correct phrase should be "my friend and me."