Find the error in the sentence given below(A) I have a childhood friend,/(B) I always listen to him/(C) because he is /(D) true in his word.

Step 1: Break Down the Problem

The sentence is segmented into parts (A), (B), (C), and (D). We need to identify any grammatical or contextual errors within these segments.

Step 2: Relevant Concepts

1. Consistency in expression: The phrase "true in his word" is not a common or grammatically correct expression in English.
2. Common English phrases: The correct phrase to express reliability or honesty is typically "true to his word."

Step 3: Analysis and Detail

1. Segment (A) is correct: "I have a childhood friend," is a clear and grammatically sound introduction.
2. Segment (B) is also correct: "I always listen to him" makes sense contextually as it indicates that the speaker values their friend's opinion.
3. Segment (C) is accurate: "because he is" smoothly leads into the reason for the speaker's behavior.
4. Segment (D) contains the error: "true in his word" should be corrected to "true to his word." This change conveys that the friend is dependable and keeps his promises.

Step 4: Verify and Summarize

The only error found is within segment (D) where "in" is replaced with "to" to express the correct idiomatic expression.

Final Answer

The corrected sentence should read: "I have a childhood friend, I always listen to him because he is true to his word."