Pre-ignition is caused by the spontantaneous combustion of the mixture before the end of the compression stroke, and is due to

1. 

Pre-ignition is caused by the spontantaneous combustion of the mixture before the end of the compression stroke, and is due to
[A]. cylinder walls being too hot
[B]. overheated spark plug points
[C]. red hot carbon deposits on cylinder walls
[D]. any one of these

Answer: Option D

Explanation:

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