Step 1: Understanding the problem.
Complete silence in the classroom may indicate various factors, but it generally reflects poor management or lack of engagement, which can lead to silence. A well-managed classroom should have interactive discussions, with students motivated and involved in the learning process.
Step 2: Conclusion.
The answer is poor management of the class, as silence often results from ineffective teaching methods or lack of student engagement.
Final Answer: Poor management of class room.