In an exercise, the question was-Measure the lengths of the line segments P. - Q and R .S. The child answered length of AB=5 cm, length of AB = 3 cm This refers to

Options

A. conceptual error
B. procedural error
C. error due to habit of naming line segment as AB
D. reading error

Answer

To solve the problem, we need to analyze the child's response to the teacher's question about measuring the lengths of the line segments PQ and RS. The child mistakenly referred to the lengths of the segments as AB instead of using the correct labels. Here's a step-by-step breakdown of the solution:

### Step-by-Step Solution:

1. **Understanding the Question**: The teacher asked the child to measure the lengths of two specific line segments, PQ and RS.

**Hint**: Identify what the teacher is asking for in the question.

2. **Child's Response**: The child provided the lengths as follows: length of AB = 5 cm and length of AB = 3 cm.

**Hint**: Pay attention to the labels used by the child for the line segments.

3. **Identifying the Error**: The child referred to both line segments as AB, which is incorrect. The segments should have been referred to as PQ and RS, respectively.

**Hint**: Look for any inconsistencies in the naming of the segments.

4. **Classifying the Error**: The error can be classified as a conceptual error. The child seems to have a misunderstanding about the naming of line segments, treating all segments as if they were the same (AB).

**Hint**: Determine if the error is related to understanding the concept or the procedure of measuring.

5. **Selecting the Correct Option**: Among the options provided:
- Option A: Conceptual error - Incorrect understanding of the concept.
- Option B: Procedural error - Error in the measuring procedure.
- Option C: Error due to line segment as AB - Correct, as the child misnamed the segments.
- Option D: Reading error - Incorrect interpretation of the question.

The correct answer is **Option C**, as the child incorrectly referred to the segments as AB.

**Hint**: Evaluate each option to find the one that best describes the child's mistake.

### Final Answer:
The correct classification of the child's error is **Option C: error due to line segment as AB**.