Final Answer:
The statement given "A very unkind malefactor set fire to the library." is true. Option A is the answer.
Step-by-step explanation:
The provided statement is a standalone assertion without additional context or information. Without specific details or evidence, it is challenging to ascertain the accuracy of the statement. The veracity of the claim depends on the source or context in which it is presented. If the statement is part of a fictional story or scenario, its truthfulness may be subjective to the narrative.
However, in a factual or historical context, the accuracy would depend on reliable evidence or documentation.
Option A is the answer.