What is the difference between interference and non-interference gears?

What is the difference between interference and non-interference gears?

• A. Interference gears have no space for misalignment; non-interference gears do not require precise assembly
• B. Interference gears require precise assembly to avoid contact; non-interference gears have space to avoid contact during assembly
• C. Interference gears wear slower
• D. Non-interference gears are always in motion during operation

Answer: (B)